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CVE-2026-87029

MEDIUM 5.9

Published 2026-10-15 · Last modified 2026-10-16

undici is an HTTP client library for Node.js. In versions 7.15.0 through 7.30.0 and 8.0.0 through 8.12.1, its decompress interceptor forwards decompressed response data to the downstream handler from zlib stream event callbacks without catching exceptions those callbacks may throw, and while undici's engine converts a synchronous throw from a downstream handler into a per-request failure, that protection is absent when the throw happens asynchronously from a zlib callback. As a result, a downstream handler that throws by design, such as the built-in dump interceptor which throws when a response exceeds its configured maximum size, escapes as an uncaught exception that terminates the Node.js process. A malicious or compromised HTTP server can crash any client that composes the decompress interceptor with such a handler by returning a small compressed body that decompresses to more than the configured limit, so only the decompressed size matters and the bytes on the wire stay tiny. The issue is fixed in undici 7.30.1 and 8.12.2, and users should upgrade to one of those versions or later. As a workaround, avoid composing the decompress interceptor with a response handler that throws during response processing until upgrading.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.3%chance of exploitation in 30 days · 18th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

5.9CVSS 3.1 · MEDIUM

  • ConfidentialityNone
  • IntegrityNone
  • 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: Needs a race window or specific setup

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

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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 Undici Nodejs

Products Undici

Weakness (CWE)

  • CWE-248: : Uncaught Exception

CVSS vector

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

References and research data (JSON)

Vendor product assessments

Showing 32 of 170 vendor product statements; 138 omitted. Read the full vendor advisory.

  • nodejs24-0:24.21.0-1.5.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
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs24-bin-0:24.21.0-1.5.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
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs24-devel-0:24.21.0-1.5.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
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs24-docs-0:24.21.0-1.5.hum1@noarch@public-hummingbird-s390x-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-s390x-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
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs24-full-i18n-0:24.21.0-1.5.hum1@x86_64 as a component of Red Hat Hardened Images · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]?arch=x86_64&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
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs24-libs-0:24.21.0-1.5.hum1@x86_64 as a component of Red Hat Hardened Images · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]?arch=x86_64&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
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs24-npm-bin-0:24.21.0-1.5.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
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs26-0:26.11.1-0.4.hum1@s390x as a component of Red Hat Hardened Images · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]?arch=s390x&distro=hummingbird-20251124&repository_id=public-hummingbird-s390x-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
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs26-bin-0:26.11.1-0.4.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
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs26-devel-0:26.11.1-0.4.hum1@s390x as a component of Red Hat Hardened Images · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]?arch=s390x&distro=hummingbird-20251124&repository_id=public-hummingbird-s390x-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
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs26-docs-0:26.11.1-0.4.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
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs26-full-i18n-0:26.11.1-0.4.hum1@x86_64 as a component of Red Hat Hardened Images · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]?arch=x86_64&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
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs26-npm-0:11.20.0-1.26.11.1.0.4.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
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs26-npm-bin-0:26.11.1-0.4.hum1@noarch@public-hummingbird-s390x-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-s390x-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
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • v8-13.6-devel-0:13.6.233.17-1.24.21.0.1.5.hum1@s390x as a component of Red Hat Hardened Images · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]?arch=s390x&distro=hummingbird-20251124&repository_id=public-hummingbird-s390x-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
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • v8-14.6-devel-0:14.6.202.34-1.26.11.1.0.4.hum1@x86_64 as a component of Red Hat Hardened Images · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]?arch=x86_64&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
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • cryostat/cryostat-openshift-console-plugin-rhel9 as a component of Cryostat 4 · known affected

    Vendor assessment for this product only.

    pkg:oci/cryostat-openshift-console-plugin-rhel9@sha256:27ce23fe3bf779a813b98fe9fea4fae32c888eb497ebe0c0016c34f14f315512?repository_url=registry.redhat.io/cryostat/cryostat-openshift-console-plugin-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • rhdh/red-hat-developer-hub-backstage-plugin-orchestrator-backend-module-loki as a component of Red Hat Developer Hub · known affected

    Vendor assessment for this product only.

    pkg:oci/red-hat-developer-hub-backstage-plugin-orchestrator-backend-module-loki@sha256:5549940696691cc087777c20f5d46b485d31e9fe3db896caa2eca7bfef3edb72?repository_url=registry.redhat.io/rhdh/red-hat-developer-hub-backstage-plugin-orchestrator-backend-module-loki

    • none available: Affected
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs-docs as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-docs

    • none available: Fix deferred
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs24-full-i18n as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs24-full-i18n

    • none available: Fix deferred
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs-devel (nodejs:24) as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-devel?rpmmod=nodejs:24

    • none available: Fix deferred
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs-nodemon.src (nodejs:24) as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-nodemon?arch=src&rpmmod=nodejs:24

    • none available: Fix deferred
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs-packaging (nodejs:24) as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-packaging?rpmmod=nodejs:24

    • none available: Fix deferred
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • ubi8/nodejs-24-minimal as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:oci/nodejs-24-minimal@sha256:2b83564f8e9580bda5cdfcd5c79f7b3a144aab139e25f3535f8503edec282760?repository_url=registry.redhat.io/ubi8/nodejs-24-minimal

    • none available: Fix deferred
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs-docs (nodejs:26) as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-docs?rpmmod=nodejs:26

    • none available: Fix deferred
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • nodejs.src (nodejs:24) as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs?arch=src&rpmmod=nodejs:24

    • none available: Fix deferred
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • ubi9/nodejs-24 as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:oci/nodejs-24@sha256:07b369ed90167eaa3249845359f52f565c3a7cab72d833b999976bcee395d069?repository_url=registry.redhat.io/ubi9/nodejs-24

    • none available: Fix deferred
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • rhoai/odh-mod-arch-automl-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-mod-arch-automl-rhel9@sha256:5cfd714e9a5fa61ed867771fbbb2b22e5a79ad05fd6940fa80dab09dfa43aef6?repository_url=registry.redhat.io/rhoai/odh-mod-arch-automl-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • openshift4/ose-monitoring-plugin-rhel9 as a component of Red Hat OpenShift Container Platform 4 · known affected

    Vendor assessment for this product only.

    pkg:oci/ose-monitoring-plugin-rhel9@sha256:22c754099b0b7c78afdaa57bb911c0d0485a1d1b64fdaff0b9b5e92448a322d6?repository_url=registry.redhat.io/openshift4/ose-monitoring-plugin-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • odf4/odf-multicluster-console-rhel9 as a component of Red Hat Openshift Data Foundation 4 · known affected

    Vendor assessment for this product only.

    pkg:oci/odf-multicluster-console-rhel9@sha256:6fbfe726dc737df7aff1b7bfd59091f2bc56075b238a40b8ad94343131c49203?repository_url=registry.redhat.io/odf4/odf-multicluster-console-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • ansible-automation-platform/bootc-automation-portal-rhel9 as a component of Self-service automation portal 2 · known affected

    Vendor assessment for this product only.

    pkg:oci/bootc-automation-portal-rhel9@sha256:8553c734145775879bdfe2befa9f2df1c22c6d7db2f2251401c3cc517a7e0394?repository_url=registry.redhat.io/ansible-automation-platform/bootc-automation-portal-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00
  • grafana12.4.src as a component of Red Hat Hardened Images · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

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

    Red Hat · CVE-2026-87029 · Updated 2026-10-19T21:42:01+00:00

Known Affected Software Configurations

VendorProductVersion range
NodejsUndici≥ 7.15.0 and < 7.30.1
NodejsUndici≥ 8.0.0 and < 8.12.2

All CVSS metrics

  • MEDIUM 5.9 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  • MEDIUM 5.9 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  • HIGH 7.5 v3.1 · NVD Primary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Patches & mitigations

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS