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Fencer Vulns
high 7.4

CVE-2026-42035 json

Axios: Header Injection via Prototype Pollution

published 2026-04-24 6 mo ago modified 2026-09-10 1 mo ago also EUVD-2026-25589 , GHSA-6chq-wfr3-2hj9

cvss
7.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 34%
public exploits
0
none known

Summary

Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, a prototype pollution gadget exists in the Axios HTTP adapter (lib/adapters/http.js) that allows an attacker to inject arbitrary HTTP headers into outgoing requests. The vulnerability exploits duck-type checking of the data payload, where if Object.prototype is polluted with getHeaders, append, pipe, on, once, and Symbol.toStringTag, Axios misidentifies any plain object payload as a FormData instance and calls the attacker-controlled getHeaders() function, merging the returned headers into the outgoing request. The vulnerable code resides exclusively in lib/adapters/http.js. The prototype pollution source does not need to originate from Axios itself — any prototype pollution primitive in any dependency in the application's dependency tree is sufficient to trigger this gadget. This vulnerability is fixed in 1.15.1 and 0.31.1.

Patch / fix

  • npm axios 0.31.1, 1.15.1
  • axios axios 0.31.1, 1.15.1
  • node-axios Debian 14 1.15.2-1

debian advisories DEBIAN-CVE-2026-42035

  • python3.12-pyjwt ansible automation platform 2.6 2.13.0-1.el9ap
  • python3.12-urllib3 ansible automation platform developer 2.6, ansible automation platform 2.6 2.7.0-1.el9ap
  • python3.12-pysequoia ansible automation platform 2.6 0.1.34-1.el9ap
  • automation-controller ansible automation platform developer 2.6, ansible automation platform 2.6 4.7.13-2.el9ap
  • automation-platform-ui ansible automation platform 2.6 2.6.10-1.el9ap
  • python3.12-pyjwt+crypto ansible automation platform 2.6 2.13.0-1.el9ap
  • automation-controller-ui ansible automation platform 2.6 4.7.13-2.el9ap
  • automation-controller-cli ansible automation platform developer 2.6, ansible automation platform 2.6 4.7.13-2.el9ap

red hat advisories RHSA-2026:34160

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-2026-42035 updated cvss 7.4

axios: Axios: Arbitrary HTTP header injection via prototype pollution

  • Red Hat Migration Toolkit for Applications 8 mta/mta-ui-rhel8, mta/mta-ui-rhel9 Red Hat OpenShift Pipelines openshift-pipelines/pipelines-hub-ui-rhel8, openshift-pipelines/pipelines-hub-ui-rhel9
    affected: workaround, no fix available
  • Red Hat 3scale API Management Platform 2 3scale-amp2/system-rhel8
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Ansible Automation Platform 2 automation-hub, automation-controller, ansible-automation-platform/automation-dashboard-rhel9
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat build of Apicurio Registry 2 axios
    affected: workaround, no fix planned “Will not fix”
  • Red Hat build of Apicurio Registry 3 apicurio/apicurio-registry-ui-rhel8, apicurio/apicurio-registry-ui-rhel9
    affected: workaround, no fix available
  • Red Hat Build of Podman Desktop - Tech Preview rhdesktop/rh-podman-desktop-ext-openshift-local-rhel10 Red Hat Developer Hub 1 rhdh/backstage-community-plugin-catalog-backend-module-scaffolder-relation-processor Red Hat Enterprise Linux 8 grafana, grafana-loki, grafana-mssql, grafana-mysql, grafana-selinux, grafana-graphite, +8 more
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-cuda-rhel9, rhelai3/bootc-rocm-rhel9, rhelai3/disk-image-cuda-rhel9
    affected: workaround, no fix available
  • Red Hat Fuse 7 axios
    affected: workaround, no fix planned “Will not fix”
show 25 more
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-mod-arch-maas-rhel9, rhoai/odh-mod-arch-gen-ai-rhel9 Red Hat OpenShift Container Platform 4 openshift3/ose-console Red Hat OpenShift Virtualization 4 container-native-virtualization/kubevirt-console-plugin, container-native-virtualization/kubevirt-console-plugin-rhel9 Red Hat Trusted Profile Analyzer rhtpa/rhtpa-trustification-service-rhel9 Red Hat Self-service automation portal 2 ansible-automation-platform/automation-portal
    affected: workaround, no fix available
  • Red Hat Cluster Observability Operator 1.5 cluster-observability-operator/monitoring-console-plugin-rhel9 1781116422, cluster-observability-operator/monitoring-console-plugin-pf5-rhel9 1781116667, cluster-observability-operator/monitoring-console-plugin-pf6-rhel9 1781116671, cluster-observability-operator/distributed-tracing-console-plugin-rhel9 1781116392, cluster-observability-operator/distributed-tracing-console-plugin-pf4-rhel9 1781116645, cluster-observability-operator/distributed-tracing-console-plugin-pf5-rhel9 1781116658, +1 more
    fixed: vendor fix RHSA-2026:26010
  • Red Hat HawtIO HawtIO 4.4.0
    fixed: vendor fix RHSA-2026:25089
  • Red Hat multicluster engine for Kubernetes 2.6 multicluster-engine 1778511348
    fixed: vendor fix RHSA-2026:17657
  • Red Hat multicluster engine for Kubernetes 2.8 multicluster-engine 1778383863
    fixed: vendor fix RHSA-2026:17699
  • Red Hat multicluster engine for Kubernetes 2.9 multicluster-engine 1778532610
    fixed: vendor fix RHSA-2026:19109
  • Red Hat multicluster engine for Kubernetes 2.10 multicluster-engine/console-mce-rhel9 1780917531
    fixed: vendor fix RHSA-2026:24536
  • Red Hat multicluster engine for Kubernetes 2.11 multicluster-engine/console-mce-rhel9 1780910888
    fixed: vendor fix RHSA-2026:25271
  • Red Hat Network Observability (NETOBSERV) 1.11.0 network-observability 1778508956, network-observability 1778510461
    fixed: vendor fix RHSA-2026:16874
  • Red Hat Advanced Cluster Management for Kubernetes 2.14 rhacm2/console-rhel9 1783451729
    fixed: vendor fix RHSA-2026:36882
  • Red Hat Advanced Cluster Management for Kubernetes 2.15 rhacm2/console-rhel9 1780876734
    fixed: vendor fix RHSA-2026:24539
  • Red Hat Advanced Cluster Management for Kubernetes 2.16 rhacm2/console-rhel9 1780600823
    fixed: vendor fix RHSA-2026:25273
  • Red Hat Advanced Cluster Security 4.9 advanced-cluster-security/rhacs-main-rhel8 1779371594
    fixed: vendor fix RHSA-2026:20938
  • Red Hat Advanced Cluster Security for Kubernetes for IBM Power, little endian 4.10 advanced-cluster-security 1779293013
    fixed: vendor fix RHSA-2026:20889
  • Red Hat Ansible Automation Platform 2.6 for RHEL 9 automation-platform-ui 2.6.10-1.el9ap
    fixed: vendor fix RHSA-2026:34160
  • Red Hat Ceph Storage 9.2 rhceph/rhceph-9-rhel10 1790843527
    fixed: vendor fix RHSA-2026:86618
  • Red Hat Developer Hub 1.8 rhdh/rhdh-hub-rhel9 1779841586
    fixed: vendor fix RHSA-2026:21338
  • Red Hat Developer Hub 1.9 rhdh/rhdh-hub-rhel9 1782761244
    fixed: vendor fix RHSA-2026:33574
  • Red Hat Discovery 2 discovery 1778156756
    fixed: vendor fix RHSA-2026:14937
  • Red Hat Migration Toolkit 1.8 rhmtc/openshift-migration-ui-rhel8 1780590717
    fixed: vendor fix RHSA-2026:25041
  • Red Hat OpenShift AI 2.25 rhoai/odh-dashboard-rhel9 1780467029, rhoai/odh-mod-arch-model-registry-rhel9 1780467147
    fixed: vendor fix RHSA-2026:24977
  • Red Hat OpenShift Container Platform 4.20 openshift4 1778645099
    fixed: vendor fix RHSA-2026:17468
  • Red Hat OpenShift Container Platform 4.21 openshift4 1778539338
    fixed: vendor fix RHSA-2026:17474
  • Red Hat OpenShift Dev Spaces 3.28 devspaces/code-rhel9 1779814592, devspaces/dashboard-rhel9 1779341289
    fixed: vendor fix RHSA-2026:21772
  • Red Hat OpenShift Service Mesh 2.6 openshift-service-mesh 1778191378, openshift-service-mesh 1778191473
    fixed: vendor fix RHSA-2026:16476

13 more fixed, 44 more not affected in the full advisory

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
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
6 mo ago

Exploit prediction

0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/axios/axios/security/advisories/GHSA-6chq-wfr3-2hj9 referenced PoC, tagged "exploit" by a source, unverified

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 axios
>=1.0.0, <1.15.1
<0.31.1
1.15.1
0.31.1

Affected products

  • axios axios

Classification

Weakness
  • CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers
  • CWE-1321 Improperly Controlled Modification of Object Prototype Attributes

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.

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