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Fencer Vulns
high 7.4

CVE-2026-85152 json

undici vulnerable to cross-origin cache poisoning via missing origin isolation in interceptors

published 2026-09-04 2 mo ago modified 2026-09-29 40 d ago also GHSA-vp8m-p9jh-q5pm , EUVD-2026-71474

cvss
7.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 5%
public exploits
0
none known

Summary

undici 8.10.0 omits the destination origin from the cache and request-deduplication keys when the cache or deduplicate interceptor is composed directly onto a Client or Pool. Because the internal cache key falls back to an empty origin string, a cacheable or in-flight response from one upstream origin is returned for a request to a different, trusted origin whenever the method, path, and relevant headers match, which permits cross-origin information disclosure and persistent cache poisoning. The reporter demonstrated a full authentication bypass in which a JWT signed with an attacker-controlled key was accepted as belonging to a trusted issuer, and the trusted origin was never contacted. This is a regression introduced in 8.10.0 and affects undici versions from 8.10.0 up to 8.10.2. Applications using an Agent, which carries the origin in its dispatch options, are not affected. Users should upgrade to undici 8.10.2.

Patch / fix

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

debian advisories DEBIAN-CVE-2026-85152

  • npm RHEL 8 1:11.19.0-1.24.21.0.1.module+el8.10.0+24927+ed3d907a
  • nodejs RHEL 8 1:24.21.0-1.module+el8.10.0+24927+ed3d907a
  • nodejs-libs RHEL 8 1:24.21.0-1.module+el8.10.0+24927+ed3d907a
  • nodejs-nodemon RHEL 8 3.1.14-2.module+el8.10.0+24711+b610b202
  • nodejs-full-i18n RHEL 8 1:24.21.0-1.module+el8.10.0+24927+ed3d907a
  • nodejs-packaging RHEL 8 2021.06-6.module+el8.10.0+24711+b610b202
  • nodejs-packaging-bundler RHEL 8 2021.06-6.module+el8.10.0+24711+b610b202
  • npm RHEL 9 1:11.19.0-1.24.21.0.1.module+el9.8.0+24924+cd677006

red hat advisories RHSA-2026:74085RHSA-2026:73838RHSA-2026:73428RHSA-2026:63782RHSA-2026:54438RHSA-2026:54389

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

opensuse advisories openSUSE-SU-2026:22111-1

  • npm AlmaLinux 9 1:11.19.0-1.24.21.0.1.module_el9.8.0+321+1555b6a2
  • nodejs AlmaLinux 9 1:24.21.0-1.module_el9.8.0+321+1555b6a2
  • nodejs-libs AlmaLinux 9 1:24.21.0-1.module_el9.8.0+321+1555b6a2
  • nodejs-nodemon AlmaLinux 9 3.1.14-3.module_el9.8.0+292+f4eaf8b2
  • nodejs-full-i18n AlmaLinux 9 1:24.21.0-1.module_el9.8.0+321+1555b6a2
  • nodejs-packaging AlmaLinux 9 2021.06-6.module_el9.7.0+209+ecf6523e
  • nodejs-packaging-bundler AlmaLinux 9 2021.06-6.module_el9.7.0+209+ecf6523e
  • npm AlmaLinux 8 1:11.19.0-1.24.21.0.1.module_el8.10.0+4292+21afb960

almalinux advisories ALSA-2026:73838ALSA-2026:74085ALSA-2026:73428

  • nodejs24 Rocky Linux 10 1:24.21.0-1.el10_2
  • nodejs-nodemon Rocky Linux 8 3.1.14-2.module+el8.10.0+40277+b1b3f89e
  • nodejs-nodemon Rocky Linux 8 3.1.14-2.module+el8.10.0+40278+50b003a3
  • nodejs-packaging Rocky Linux 8 2021.06-6.module+el8.10.0+40171+8fa9c325
  • nodejs-packaging Rocky Linux 8 2021.06-6.module+el8.10.0+40172+38f6fdd1
  • nodejs-packaging Rocky Linux 8 2021.06-6.module+el8.10.0+40048+6d99f608
  • nodejs-nodemon Rocky Linux 9 3.1.14-3.module+el9.8.0+40281+14cc6568
  • nodejs-packaging Rocky Linux 9 2021.06-6.module+el9.7.0+40153+4d595597

rocky linux advisories RLSA-2026:73428RLSA-2026:74085RLSA-2026:73838

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-2026-85152 updated cvss 7.4

undici: undici: Authentication bypass via cross-origin cache poisoning due to missing origin isolation

  • Red Hat Exploit Intelligence exploit-intelligence/vulnerability-analysis-rhel9 Red Hat OpenShift Pipelines openshift-pipelines/pipelines-console-plugin-rhel9, openshift-pipelines/pipelines-console-plugin-pf5-rhel9 Red Hat AMQ Broker 7 amq-broker-maven-repository.zip 7.14.1.CR3 Red Hat Build of Podman Desktop rh-podman-desktop.git 1.1.0
    affected: workaround, no fix available
  • Red Hat Enterprise Linux 8 npm, nodejs, nodejs-libs, nodejs-nodemon, ubi8/nodejs-24, nodejs-full-i18n, +3 more Red Hat Enterprise Linux 9 npm, nodejs, nodejs-libs, rhel9/nodejs-24, nodejs-full-i18n, rhel9/nodejs-24-minimal Red Hat Enterprise Linux 10 rhel10/nodejs-24, nodejs26 26.1.0-1.el10, rhel10/nodejs-24-minimal, nodejs22 22.23.2-1.el10_2
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat Hardened Images nodejs25 25.9.0-1.6.hum1
    affected: workaround, no fix planned “Will not fix”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-mlflow-rhel9, rhoai/odh-core-bff-rhel9, rhoai/odh-dashboard-operator-rhel9, rhoai/odh-mod-arch-agent-ops-rhel9 Red Hat Openshift Data Foundation 4 odf4/mcg-core-rhel9, odf4/ocs-client-console-rhel9, odf4/odf-multicluster-console-rhel9
    affected: workaround, no fix available
  • Red Hat Secrets Management Console for Red Hat OpenShift external-secrets-management/console-plugin-rhel9
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Cluster Observability Operator 1.5 cluster-observability-operator/distributed-tracing-console-plugin-pf4-rhel9 1793661804, cluster-observability-operator/distributed-tracing-console-plugin-pf4-rhel9 1793823428, cluster-observability-operator/distributed-tracing-console-plugin-pf5-rhel9 1793664067, cluster-observability-operator/distributed-tracing-console-plugin-pf5-rhel9 1793825585, cluster-observability-operator/distributed-tracing-console-plugin-pf6-rhel9 1793662261, cluster-observability-operator/distributed-tracing-console-plugin-pf6-rhel9 1793822910
    fixed: vendor fix RHSA-2026:95591
  • Red Hat Ansible Automation Platform 2.1 ansible-automation-platform/automation-portal 1791295379
    fixed: vendor fix RHSA-2026:80603
  • Red Hat Ansible Automation Platform 2.2 ansible-automation-platform/automation-portal 1791293780
    fixed: vendor fix RHSA-2026:80644
show 12 more
  • Red Hat Enterprise Linux AppStream (v. 8) nodejs 24.21.0-1.module+el8.10.0+24927+ed3d907a, nodejs-libs 24.21.0-1.module+el8.10.0+24927+ed3d907a, nodejs-nodemon 3.1.14-2.module+el8.10.0+24711+b610b202, npm 11.19.0-1.24.21.0.1.module+el8.10.0+24927+ed3d907a, nodejs-full-i18n 24.21.0-1.module+el8.10.0+24927+ed3d907a, nodejs-packaging 2021.06-6.module+el8.10.0+24711+b610b202, +1 more
    fixed: vendor fix RHSA-2026:74085
  • Red Hat Enterprise Linux AppStream (v. 9) nodejs 24.21.0-1.module+el9.8.0+24924+cd677006, nodejs-libs 24.21.0-1.module+el9.8.0+24924+cd677006, nodejs-nodemon 3.1.14-3.module+el9.8.0+24708+e71d2e1d, npm 11.19.0-1.24.21.0.1.module+el9.8.0+24924+cd677006, nodejs-full-i18n 24.21.0-1.module+el9.8.0+24924+cd677006, nodejs-packaging 2021.06-6.module+el9.8.0+24708+e71d2e1d, +1 more
    fixed: vendor fix RHSA-2026:73838
  • Red Hat Enterprise Linux AppStream (v. 10) nodejs24 24.21.0-1.el10_2, nodejs24-libs 24.21.0-1.el10_2, nodejs24-full-i18n 24.21.0-1.el10_2, nodejs24-npm 11.19.0-1.24.21.0.1.el10_2
    fixed: vendor fix RHSA-2026:73428
  • Red Hat Hardened Images nodejs26 26.7.0-1.5.2.hum1, grafana12.4 12.4.9-0.6.hum1, nodejs24 24.18.1-0.2.2.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-2026:63782
  • Red Hat OpenShift AI 2.25 rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9 1791288400
    fixed: vendor fix RHSA-2026:87410
  • Red Hat OpenShift AI 3.4 rhoai/odh-dashboard-rhel9 1791861020, rhoai/odh-mod-arch-maas-rhel9 1791860708, rhoai/odh-mod-arch-automl-rhel9 1791861032, rhoai/odh-mod-arch-gen-ai-rhel9 1791861479, rhoai/odh-mod-arch-mlflow-rhel9 1791861383, rhoai/odh-mod-arch-autorag-rhel9 1791860994, +3 more
    fixed: vendor fix RHSA-2026:84734
  • Red Hat OpenShift AI 3.5 rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9 1791825469
    fixed: vendor fix RHSA-2026:86891
  • Red Hat Openshift Data Foundation 4.19 odf4/odf-console-rhel9 1793126829
    fixed: vendor fix RHSA-2026:92650
  • Red Hat OpenShift Dev Spaces 3.31 devspaces/dashboard-rhel9 1791945540
    fixed: vendor fix RHSA-2026:90321
  • Red Hat Cluster Observability Operator 1.5 cluster-observability-operator/perses-rhel9 1793661985, cluster-observability-operator/perses-rhel9 1793825744, cluster-observability-operator/thanos-rhel9 1793660568, cluster-observability-operator/thanos-rhel9 1793821585, cluster-observability-operator/korrel8r-rhel9 1793661297, cluster-observability-operator/korrel8r-rhel9 1793822079, +38 more Red Hat AMQ Broker 7 amq-broker-bin.zip 7.14.1.CR2
    not affected: vulnerable code not present
  • Red Hat Ansible Automation Platform 2 automation-platform-ui 2.6.13-1.el9ap
    not affected: component not present
  • 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 9 ubi9/nodejs-24, ubi9/nodejs-24-minimal Red Hat Enterprise Linux 10 ubi10/nodejs-24, grafana 12.4.3-2.el10, ubi10/nodejs-24-minimal 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 Red Hat OpenShift AI 2.25 rhoai/odh-rhel9-operator 1792570619, rhoai/odh-vllm-cpu-rhel9 1792018436, rhoai/odh-dashboard-rhel9 1791853525, rhoai/odh-modelmesh-rhel9 1790881700, rhoai/odh-operator-bundle 1792571069, rhoai/odh-vllm-cuda-rhel9 1791358976, +65 more Red Hat OpenShift AI 3.4 rhoai/odh-cli-rhel9 1791509689, rhoai/rhai-cli-rhel9 1791509689, rhoai/odh-automl-rhel9 1791535789, rhoai/odh-mlflow-rhel9 1791865967, rhoai/odh-autorag-rhel9 1791557539, rhoai/odh-trainer-rhel9 1791869783, +91 more
    +7 more products
    Red Hat OpenShift AI 3.5 rhoai/odh-cli-rhel9 1791945905, rhoai/rhai-cli-rhel9 1791945905, rhoai/odh-automl-rhel9 1791916705, rhoai/odh-mlflow-rhel9 1791947857, rhoai/odh-autorag-rhel9 1791903266, rhoai/odh-trainer-rhel9 1791952138, +112 more Red Hat OpenShift Container Platform 4 wasmedge, wasmedge-rt, openshift4/ose-monitoring-plugin-rhel9 Red Hat Openshift Data Foundation 4.19 odf4/cephcsi-rhel9 1793125678, odf4/odf-cli-rhel9 1793126086, odf4/mcg-core-rhel9 1793125866, odf4/mcg-rhel9-operator 1793125881, odf4/ocs-rhel9-operator 1793126016, odf4/odf-rhel9-operator 1793126364, +26 more Red Hat OpenShift Dev Spaces devspaces/code-rhel9, devspaces/openvsx-rhel9, devspaces/pluginregistry-rhel9 Red Hat OpenShift Dev Spaces 3.31 devspaces/udi-rhel9 1792708612, devspaces/code-rhel9 1792599388, devspaces/server-rhel9 1792775639, devspaces/openvsx-rhel9 1792494821, devspaces/traefik-rhel9 1792464177, devspaces/udi-base-rhel9 1792686842, +9 more Red Hat Trusted Artifact Signer rhtas/rhtas-console-ui-rhel9 Red Hat Self-service automation portal 2 ansible-automation-platform/bootc-automation-portal-rhel9
    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
total
Assessed
2 mo ago

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
GitHub 3.1 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
npm undici
>=8.10.0, <8.10.2
8.10.2

Affected products

  • undici undici

Classification

Weakness

References

Sources

Fencer Vulns 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.