High7.4Vendor: MediumRed Hat Linux

High [CVE-2026-42035] Arbitrary HTTP header injection via prototype pollution

This high-severity Red Hat Linux advisory covers CVE-2026-42035 affecting Red Hat Enterprise Linux 9, openshift-service-mesh/kiali-rhel9:1778164042, cluster-observability-operator/monitoring-console-plugin-pf5-rhel9:1781116667.

CVE-2026-42035 Published Apr 24, 2026

CVE-2026-42035

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

Arbitrary HTTP header injection via prototype pollution. Red Hat rates this moderate (CVSS 7.4).

Weakness: CWE-915.

Affected package(s): openshift-service-mesh/kiali-rhel9:1778164042, cluster-observability-operator/monitoring-console-plugin-pf5-rhel9:1781116667, satellite/iop-advisor-frontend-rhel9:1781181673, rhacm2/console-rhel9:1780600823, cluster-observability-operator/distributed-tracing-console-plugin-pf6-rhel9:1781116387, quay/quay-rhel9:1779922205.

Resolved in Red Hat advisory RHSA-2026:14937 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux 9.

Affected versions

openshift-service-mesh/kiali-rhel9:1778164042
cluster-observability-operator/monitoring-console-plugin-pf5-rhel9:1781116667
satellite/iop-advisor-frontend-rhel9:1781181673
rhacm2/console-rhel9:1780600823
cluster-observability-operator/distributed-tracing-console-plugin-pf6-rhel9:1781116387
quay/quay-rhel9:1779922205
openshift-service-mesh/kiali-ossmc-rhel8:1778191473
quay/quay-rhel8:1779822261
openshift-service-mesh/kiali-rhel9:1778164208
openshift-service-mesh/kiali-ossmc-rhel9:1778163785
axios
cluster-observability-operator/monitoring-console-plugin-rhel9:1781116422

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

RHSA-2026:14937

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the affected package(s) to the fixed version shipped in RHSA-2026:14937 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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