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CVE-2026-91992

HIGH 8.2

Published 2026-09-15 · Last modified 2026-09-17

Tornado before 6.5.7 contains a credential leak vulnerability in CurlAsyncHTTPClient where pycurl handles are reused across requests without proper state clearing. Attackers can obtain sensitive credentials by issuing requests through the same client instance, allowing TLS certificates or proxy authentication to persist across unintended requests.

ELEVATED IMPACT

Severe if exploited (CVSS 8.2), but no known exploitation and low modeled probability. Patch on a normal cadence.

Exploitation likelihood

0.2%chance of exploitation in 30 days · 15th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

8.2CVSS 4.0 · HIGH

  • ConfidentialityHigh
  • IntegrityNone
  • AvailabilityNone

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ✓User interaction: No user interaction needed
  • ⚠Complexity: Needs a race window or specific setup
  • ⚠Requirements: Specific conditions must be present

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Tornadoweb

Products Tornado

Weakness (CWE)

  • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

References and research data (JSON)

Packages and version ranges

Each advisory describes its own package and affected ranges. A boundary applies to that range; it is not a universal upgrade recommendation.

  • tornado PyPI

    pkg:pypi/tornado

    ECOSYSTEM range
    • All earlier versions (introduced 0)
    • Fixed boundary (excluded): 6.5.7
    82 explicitly listed affected versions

    0.2, 1.0, 1.1, 1.1.1, 1.2, 1.2.1, 2.0, 2.1, 2.1.1, 2.2, 2.2.1, 2.3, 2.4, 2.4.1, 3.0, 3.0.1, 3.0.2, 3.1, 3.1.1, 3.2, 3.2.1, 3.2.2, 4.0, 4.0.1, 4.0.2, 4.1, 4.1b2, 4.2, 4.2.1, 4.2b1, 4.3, 4.3b1, 4.3b2, 4.4, 4.4.1, 4.4.2, 4.4.3, 4.4b1, 4.5, 4.5.1, 4.5.2, 4.5.3, 4.5b1, 4.5b2, 5.0, 5.0.1, 5.0.2, 5.0a1, 5.0b1, 5.1, 5.1.1, 5.1b1, 6.0, 6.0.1, 6.0.2, 6.0.3, 6.0.4, 6.0a1, 6.0b1, 6.1, 6.1b1, 6.1b2, 6.2, 6.2b1, 6.2b2, 6.3, 6.3.1, 6.3.2, 6.3.3, 6.3b1, 6.4, 6.4.1, 6.4.2, 6.4b1, 6.5, 6.5.1, 6.5.2, 6.5.3, 6.5.4, 6.5.5, 6.5.6, 6.5b1

    Additional upstream package constraints
    {
  "database": {
    "last_known_affected_version_range": "<= 6.5.6",
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-pw6j-qg29-8w7f/GHSA-pw6j-qg29-8w7f.json"
  }
}
    GitHub Advisory Database · GHSA-pw6j-qg29-8w7f · Updated 2026-09-16T03:56:01.290461498Z

Vendor product assessments

Showing 32 of 72 vendor product statements; 40 omitted. Read the full vendor advisory.

  • exploit-intelligence-tech-preview/vulnerability-analysis-rhel9 as a component of Exploit Intelligence · known affected

    Vendor assessment for this product only.

    pkg:oci/vulnerability-analysis-rhel9?repository_url=registry.redhat.io/exploit-intelligence-tech-preview/vulnerability-analysis-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • no fix planned: Out of support scope
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • lightspeed-core/rag-tool-cpu-rhel9 as a component of Lightspeed Core · known affected

    Vendor assessment for this product only.

    pkg:oci/rag-tool-cpu-rhel9?repository_url=registry.redhat.io/lightspeed-core/rag-tool-cpu-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • openshift-lightspeed/lightspeed-ocp-rag-rhel9 as a component of OpenShift Lightspeed · known affected

    Vendor assessment for this product only.

    pkg:oci/lightspeed-ocp-rag-rhel9?repository_url=registry.redhat.io/openshift-lightspeed/lightspeed-ocp-rag-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • ansible-automation-platform-27/lightspeed-chatbot-rhel9 as a component of Red Hat Ansible Automation Platform 2 · known affected

    Vendor assessment for this product only.

    pkg:oci/lightspeed-chatbot-rhel9?repository_url=registry.redhat.io/ansible-automation-platform-27/lightspeed-chatbot-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • python3-tornado as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/python3-tornado

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhel10/keylime-verifier as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:oci/keylime-verifier?repository_url=registry.redhat.io/rhel10/keylime-verifier

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • pcs.src as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/pcs?arch=src

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • python3-tornado as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/python3-tornado

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhel9/keylime-verifier as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:oci/keylime-verifier?repository_url=registry.redhat.io/rhel9/keylime-verifier

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhelai3/bootc-rocm-rhel9 as a component of Red Hat Enterprise Linux AI (RHEL AI) 3 · known affected

    Vendor assessment for this product only.

    pkg:oci/bootc-rocm-rhel9?repository_url=registry.redhat.io/rhelai3/bootc-rocm-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhoai/odh-feature-server-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-feature-server-rhel9?repository_url=registry.redhat.io/rhoai/odh-feature-server-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhoai/odh-pipeline-runtime-datascience-cpu-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-pipeline-runtime-datascience-cpu-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-pipeline-runtime-datascience-cpu-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhoai/odh-pipeline-runtime-pytorch-cuda-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-pipeline-runtime-pytorch-cuda-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-pipeline-runtime-pytorch-cuda-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhoai/odh-pipeline-runtime-tensorflow-cuda-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-pipeline-runtime-tensorflow-cuda-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-pipeline-runtime-tensorflow-cuda-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhoai/odh-th-torch-cpu-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-th-torch-cpu-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-th-torch-cpu-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhoai/odh-th-torch-rocm-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-th-torch-rocm-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-th-torch-rocm-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhoai/odh-th06-cuda130-torch210-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-th06-cuda130-torch210-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-th06-cuda130-torch210-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhoai/odh-th06-rocm64-torch291-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-th06-rocm64-torch291-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-th06-rocm64-torch291-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-workbench-codeserver-datascience-cpu-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhoai/odh-workbench-jupyter-minimal-cuda-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-workbench-jupyter-minimal-cuda-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-workbench-jupyter-minimal-cuda-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhoai/odh-workbench-jupyter-pytorch-cuda-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-workbench-jupyter-pytorch-cuda-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-workbench-jupyter-pytorch-cuda-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhoai/odh-workbench-jupyter-pytorch-rocm-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-workbench-jupyter-pytorch-rocm-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-workbench-jupyter-pytorch-rocm-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhoai/odh-workbench-jupyter-tensorflow-rocm-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-workbench-jupyter-tensorflow-rocm-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-workbench-jupyter-tensorflow-rocm-py312-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • python-flit.src as a component of Red Hat OpenShift Container Platform 4 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]?arch=src

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • python-tornado.src as a component of Red Hat OpenShift Container Platform 4 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/python-tornado?arch=src

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhosp-rhel8/openstack-cinder-volume as a component of Red Hat OpenStack Platform 16.2 · known affected

    Vendor assessment for this product only.

    pkg:oci/openstack-cinder-volume?repository_url=registry.redhat.io/rhosp-rhel8/openstack-cinder-volume

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • no fix planned: Out of support scope
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhosp-rhel8/openstack-mariadb as a component of Red Hat OpenStack Platform 16.2 · known affected

    Vendor assessment for this product only.

    pkg:oci/openstack-mariadb?repository_url=registry.redhat.io/rhosp-rhel8/openstack-mariadb

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • no fix planned: Out of support scope
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhosp-rhel8/openstack-rabbitmq as a component of Red Hat OpenStack Platform 16.2 · known affected

    Vendor assessment for this product only.

    pkg:oci/openstack-rabbitmq?repository_url=registry.redhat.io/rhosp-rhel8/openstack-rabbitmq

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • no fix planned: Out of support scope
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhosp-rhel9/openstack-cinder-backup as a component of Red Hat OpenStack Platform 17.1 · known affected

    Vendor assessment for this product only.

    pkg:oci/openstack-cinder-backup?repository_url=registry.redhat.io/rhosp-rhel9/openstack-cinder-backup

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • no fix planned: Out of support scope
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhosp-rhel9/openstack-haproxy as a component of Red Hat OpenStack Platform 17.1 · known affected

    Vendor assessment for this product only.

    pkg:oci/openstack-haproxy?repository_url=registry.redhat.io/rhosp-rhel9/openstack-haproxy

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • no fix planned: Out of support scope
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhosp-rhel9/openstack-ovn-northd as a component of Red Hat OpenStack Platform 17.1 · known affected

    Vendor assessment for this product only.

    pkg:oci/openstack-ovn-northd?repository_url=registry.redhat.io/rhosp-rhel9/openstack-ovn-northd

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • no fix planned: Out of support scope
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00
  • rhosp-rhel9/openstack-redis as a component of Red Hat OpenStack Platform 17.1 · known affected

    Vendor assessment for this product only.

    pkg:oci/openstack-redis?repository_url=registry.redhat.io/rhosp-rhel9/openstack-redis

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • no fix planned: Out of support scope
    Red Hat · CVE-2026-91992 · Updated 2026-10-15T11:24:29+00:00

All CVSS metrics

  • HIGH 8.2 v4.0 · CNA Primary
    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
  • MEDIUM 5.9 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
  • HIGH 8.2 v4.0 · NVD Secondary
    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  • MEDIUM 5.9 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Exploit-tagged references (not proof of a PoC)

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS