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CVE-2026-9079

CRITICAL 9.8 ALL-YEARS

Published 2026-07-03 · Last modified 2026-09-15 · curl · NVD: Modified

libcurl had a flaw that when instructed to clear proxy authentication credentials which made it not do so, leaving the old credentials around to get used for subsequent transfers that should not know nor use them.

ELEVATED IMPACT

Severe if exploited (CVSS 9.8), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

1.1%chance of exploitation in 30 days · 64th percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation poc, automatable yes

Impact if exploited

9.8CVSS 3.1 · CRITICAL · ADP

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityHigh

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: No special conditions — reliably repeatable

✓ 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 weekly for the full archive, 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 Curl Haxx

Products Curl

Weakness (CWE)

  • CWE-522: Insufficiently Protected Credentials

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References and research data (JSON)

Vendor product assessments

Showing 32 of 247 vendor product statements; 215 omitted. Read the full vendor advisory.

  • curl-debuginfo-0:8.12.1-1.el10_0.10.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_0.10?arch=aarch64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • libcurl-devel-0:8.12.1-1.el10_0.10.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_0.10?arch=aarch64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • curl-debugsource-0:8.12.1-4.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_2.6?arch=aarch64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • libcurl-minimal-debuginfo-0:8.12.1-4.el10_2.6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_2.6?arch=ppc64le

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • curl-debugsource-0:8.12.1-1.el10_0.10.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_0.10?arch=aarch64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • libcurl-minimal-0:8.12.1-1.el10_0.10.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_0.10?arch=aarch64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • curl-debuginfo-0:8.12.1-4.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_2.6?arch=aarch64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • libcurl-debuginfo-0:8.12.1-4.el10_2.6.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_2.6?arch=aarch64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • registry.redhat.io/costmanagement/costmanagement-ui-rhel10@sha256:39700faac93e613fdd8139aed7b6dbb79a4d542f3f3cca6be04c4edce72eaf5d_amd64 as a component of Red Hat Cost Management On-Premise 1 · fixed

    Vendor assessment for this product only.

    pkg:oci/costmanagement-ui-rhel10@sha256%3A39700faac93e613fdd8139aed7b6dbb79a4d542f3f3cca6be04c4edce72eaf5d?arch=amd64&repository_url=registry.redhat.io/costmanagement/costmanagement-ui-rhel10&tag=1791460851

    • vendor fix: The container image provided by this update can be downloaded from the Red Hat container registry at registry.redhat.io using the "podman pull" command. Vendor guidance
    • 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.
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • libcurl-minimal-0:8.21.0-0.1.hum1@aarch64 as a component of Red Hat Hardened Images · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]?arch=aarch64&distro=hummingbird-20251124&repository_id=public-hummingbird-aarch64-rpms

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ Vendor guidance
    • 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.
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • rust-gdb-0:1.96.1-1.hum1@noarch@public-hummingbird-x86_64-rpms as a component of Red Hat Hardened Images · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]?arch=noarch&distro=hummingbird-20251124&repository_id=public-hummingbird-x86_64-rpms

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ Vendor guidance
    • 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.
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • rust-std-static-wasm32-unknown-unknown-0:1.96.1-1.hum1@noarch@public-hummingbird-aarch64-rpms as a component of Red Hat Hardened Images · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]?arch=noarch&distro=hummingbird-20251124&repository_id=public-hummingbird-aarch64-rpms

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ Vendor guidance
    • 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.
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • Red Hat JBoss Core Services 2.4.62.SP5 · fixed

    Vendor assessment for this product only.

    • vendor fix: Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • build-of-trustee/trustee-rhel9 as a component of Confidential Compute Attestation · known affected

    Vendor assessment for this product only.

    pkg:oci/trustee-rhel9?repository_url=registry.redhat.io/build-of-trustee/trustee-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: Affected
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • openshift-sandboxed-containers/osc-podvm-payload-rhel9 as a component of Confidential Compute Attestation · known affected

    Vendor assessment for this product only.

    pkg:oci/osc-podvm-payload-rhel9?repository_url=registry.redhat.io/openshift-sandboxed-containers/osc-podvm-payload-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: Affected
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • rust.src as a component of Red Hat Enterprise Linux AI (RHEL AI) 3 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/rust?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: Affected
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • libcurl.so as a component of Red Hat JBoss Core Services · known affected

    Vendor assessment for this product only.

    pkg:generic/libcurl.so

    • 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: Will not fix
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4 · known affected

    Vendor assessment for this product only.

    pkg:oci/ose-rhel-coreos-8?repository_url=registry.redhat.io/openshift/ose-rhel-coreos-8

    • 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: Affected
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4 · known affected

    Vendor assessment for this product only.

    pkg:oci/ose-rhel-coreos-9?repository_url=registry.redhat.io/openshift/ose-rhel-coreos-9

    • 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: Affected
    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • cargo as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: component not present

    pkg:rpm/redhat/cargo

    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • rust-lldb as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: component not present

    pkg:rpm/redhat/rust-lldb

    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • rust-toolset as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: component not present

    pkg:rpm/redhat/rust-toolset

    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • s390utils-cpacfstatsd as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/s390utils-cpacfstatsd

    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • s390utils-zdsfs as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/s390utils-zdsfs

    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • curl.src as a component of Red Hat Enterprise Linux 6 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/curl?arch=src

    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • aspnetcore-runtime-dbg-8.0 as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: component not present

    pkg:rpm/redhat/aspnetcore-runtime-dbg-8.0

    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • dotnet-runtime-8.0 as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: component not present

    pkg:rpm/redhat/dotnet-runtime-8.0

    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • dotnet8.0.src as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: component not present

    pkg:rpm/redhat/dotnet8.0?arch=src

    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • curl-minimal as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/curl-minimal

    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • rust-debugger-common as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: component not present

    pkg:rpm/redhat/rust-debugger-common

    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • rust-std-static-wasm32-wasi as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: component not present

    pkg:rpm/redhat/rust-std-static-wasm32-wasi

    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00
  • rhtpa/rhtpa-trustification-service-rhel9 as a component of Red Hat Trusted Profile Analyzer · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:oci/rhtpa-trustification-service-rhel9?repository_url=registry.redhat.io/rhtpa/rhtpa-trustification-service-rhel9

    Red Hat · CVE-2026-9079 · Updated 2026-10-09T01:07:53+00:00

Known Affected Software Configurations

VendorProductVersion range
HaxxCurl≥ 8.8.0 and < 8.21.0

All CVSS metrics

  • CRITICAL 9.8 v3.1 · ADP Primary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • CRITICAL 9.8 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Exploit-tagged references (not proof of a PoC)

Patches & mitigations

Advisories

Technical & other

Sources: NVD · CVE.org · All sources and attribution · EPSS