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Fencer Intel
low 3.7

CVE-2026-85008 json

undici vulnerable to caching and replay of unsafe HTTP method responses

published 2mo ago modified last mo. also EUVD-2026-71489 , GHSA-8436-99hf-9mmv

cvss
3.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits
0
none known

Summary

undici's cache interceptor documents that only safe HTTP methods are cached, but its logic to skip caching is built by subtracting the configured methods from the set of safe methods, so an unsafe method such as POST, PUT, or DELETE is never placed in the skip list and instead falls through to the full cache-read path. The response-storage gate also lacked a method check, so a response to an unsafe request that is heuristically cacheable or carries an explicit Cache-Control directive is stored and later replayed from cache. Because response headers from a remote origin are untrusted, an origin can answer once with a cacheable status and then have the client's own subsequent state-changing requests to that path served from the stale cache entry without ever reaching the origin, an integrity failure that occurs under the interceptor's default configuration. This affects undici versions from 7.0.0 up to 7.29.1 and from 8.0.0 up to 8.10.2. Users should upgrade to undici 7.29.1 or 8.10.2.

Patch / fix

  • npm undici 7.29.1, 8.10.2
  • undici undici 7.29.1, 8.10.2
  • node-undici Debian 14 8.10.2+dfsg+~cs3.2.2-1

debian advisories DEBIAN-CVE-2026-85008

  • grafana12.4 hummingbird 1 12.4.10-0.2.hum1
  • nodejs24 hummingbird 1 24.18.1-0.2.2.hum1
  • nodejs24-bin hummingbird 1 24.18.1-0.2.2.hum1
  • nodejs24-npm hummingbird 1 11.16.0-1.24.18.1.0.2.2.hum1
  • nodejs24-libs hummingbird 1 24.18.1-0.2.2.hum1
  • nodejs24-npm-bin hummingbird 1 24.18.1-0.2.2.hum1
  • nodejs24-full-i18n hummingbird 1 24.18.1-0.2.2.hum1
  • nodejs26 hummingbird 1 26.7.0-1.5.2.hum1

red hat advisories RHSA-2026:66008RHSA-2026:54438RHSA-2026:54389

  • pi-coding-agent openSUSE Leap 16.0 1.0.4-bp160.1.1

opensuse advisories openSUSE-SU-2026:22111-1

Is CVE-2026-85008 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-85008 updated cvss 3.7

undici: undici: Integrity failure due to caching of unsafe HTTP method responses

  • Red Hat Exploit Intelligence exploit-intelligence/vulnerability-analysis-rhel9
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat OpenShift Pipelines openshift-pipelines/pipelines-console-plugin-rhel9, openshift-pipelines/pipelines-console-plugin-pf5-rhel9 Red Hat AMQ Broker 7 amq-broker-bin.zip 7.14.1.CR2, amq-broker-maven-repository.zip 7.14.1.CR3 Red Hat Ansible Automation Platform 2 automation-platform-ui 2.6.13-1.el9ap Red Hat Build of Podman Desktop rh-podman-desktop.git 1.1.0 Red Hat Developer Hub 1 rhdh/rhdh-hub-rhel9, rhdh/red-hat-developer-hub-backstage-plugin-lightspeed-backend, rhdh/red-hat-developer-hub-backstage-plugin-orchestrator-backend, rhdh/red-hat-developer-hub-backstage-plugin-orchestrator-backend-module-loki, rhdh/red-hat-developer-hub-backstage-plugin-scaffolder-backend-module-orchestrator Red Hat Enterprise Linux 8 npm, nodejs, nodejs-libs, nodejs-nodemon, ubi8/nodejs-24, nodejs-full-i18n, +3 more
    +7 more products
    Red Hat Enterprise Linux 9 npm, nodejs, nodejs-libs, ubi9/nodejs-24, nodejs-full-i18n, ubi9/nodejs-24-minimal Red Hat Enterprise Linux 10 ubi10/nodejs-24, grafana 12.4.3-2.el10, nodejs26 26.1.0-1.el10, ubi10/nodejs-24-minimal, nodejs22 22.23.2-1.el10_2, nodejs24 24.19.0-1.el10_2 Red Hat Hardened Images nodejs25 25.9.0-1.6.hum1 Red Hat OpenShift AI (RHOAI) rhoai/odh-mlflow-rhel9, rhoai/odh-core-bff-rhel9, rhoai/odh-dashboard-rhel9, rhoai/odh-mod-arch-maas-rhel9, rhoai/odh-mod-arch-automl-rhel9, rhoai/odh-mod-arch-gen-ai-rhel9, +7 more Red Hat OpenShift Container Platform 4 wasmedge, wasmedge-rt, openshift4/ose-monitoring-plugin-rhel9 Red Hat Openshift Data Foundation 4 odf4/mcg-core-rhel9, odf4/odf-console-rhel9, odf4/ocs-client-console-rhel9, odf4/odf-multicluster-console-rhel9 Red Hat OpenShift Dev Spaces devspaces/code-rhel9, devspaces/openvsx-rhel9, devspaces/dashboard-rhel9, devspaces/pluginregistry-rhel9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Trusted Artifact Signer rhtas/rhtas-console-ui-rhel9 Red Hat Secrets Management Console for Red Hat OpenShift external-secrets-management/console-plugin-rhel9
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Self-service automation portal 2 ansible-automation-platform/automation-portal, ansible-automation-platform/bootc-automation-portal-rhel9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images nodejs26 26.7.0-1.5.2.hum1, nodejs24 24.18.1-0.2.2.hum1, grafana12.4 12.4.10-0.2.hum1, nodejs26-bin 26.7.0-1.5.2.hum1, nodejs24-bin 24.18.1-0.2.2.hum1, nodejs26-libs 26.7.0-1.5.2.hum1, +7 more
    fixed: vendor fix RHSA-2026:66008
  • Red Hat Hardened Images rust 1.97.1-2.hum1, jaeger 2.20.0-0.8.hum1, prometheus3.13 3.13.2-0.2.hum1
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2mo ago

Exploit prediction

0.12% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
GitHub 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
npm undici
>=7.0.0, <7.29.1
>=8.0.0, <8.10.2
7.29.1
8.10.2

Affected products

  • undici undici

Classification

Weakness
  • CWE-345 Insufficient Verification of Data Authenticity

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of nodejs/undici published their own advisory on GitHub. Reviewed sources take precedence over it.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.