High7.5Red Hat Linux

High [CVE-2026-34986] Denial of Service via crafted JSON Web Encryption (JWE) object

This high-severity Red Hat Linux advisory covers CVE-2026-34986 affecting Cryostat 4 on RHEL 9, Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux AppStream (v. 10).

CVE-2026-34986 Published Apr 6, 2026

CVE-2026-34986

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

Denial of Service via crafted JSON Web Encryption (JWE) object. Red Hat rates this important (CVSS 7.5).

Weakness: CWE-131. Affected package(s): odf4/mcg-core-rhel9:1776403991, openshift-service-mesh/pilot-rhel8:1777319850, openshift-service-mesh/istio-cni-rhel8:1777374598, odf4/odf-cloudnative-pg-rhel9-operator:1776406131, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1778867753, multicluster-engine/assisted-installer-agent-rhel9:1776351169.

Resolved in Red Hat advisory RHSA-2026:25194 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Cryostat 4 on RHEL 9; Red Hat Enterprise Linux AppStream EUS (v. 10.0); Red Hat Enterprise Linux AppStream (v. 10); Red Hat Enterprise Linux AppStream (v. 8); and 86 more.

Affected versions

odf4/mcg-core-rhel9:1776403991
openshift-service-mesh/pilot-rhel8:1777319850
openshift-service-mesh/istio-cni-rhel8:1777374598
odf4/odf-cloudnative-pg-rhel9-operator:1776406131
multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1778867753
multicluster-engine/assisted-installer-agent-rhel9:1776351169
quay/quay-rhel9:1779922205
openshift4/ose-telemeter-rhel9:1778711679
odf4/odf-rhel9-operator:1776707763
odf4/ocs-client-console-rhel9:1776404539
quay/quay-rhel8:1779822261
odf4/ocs-rhel9-operator:1778049920

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

Fixed versions

RHSA-2026:25194

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-2026:25194 (`sudo dnf update` / `yum update`).

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

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