High7.5Red Hat Linux

High [CVE-2026-5588] PKIX draft CompositeVerifier accepts empty signature sequence as valid

This high-severity Red Hat Linux advisory covers CVE-2026-5588 affecting Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8, Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9, Red Hat OpenShift Dev Spaces 3.28.

CVE-2026-5588 Published Apr 15, 2026

CVE-2026-5588

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

PKIX draft CompositeVerifier accepts empty signature sequence as valid. Red Hat rates this important (CVSS 7.5).

Weakness: CWE-347. Affected package(s): eap8-bouncycastle, devspaces/openvsx-rhel9:1779528224, eap8-guava-failureaccess, eap8-activemq-artemis, eap8-netty-transport-native-epoll, eap8-reactivex-rxjava.

Resolved in Red Hat advisory RHSA-2026:14276 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8; Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9; Red Hat OpenShift Dev Spaces 3.28; OpenShift Developer Tools and Services; and 9 more.

Affected versions

eap8-bouncycastle-0:1.84.0-1.redhat_00001.1.el8eap
devspaces/openvsx-rhel9:1779528224
eap8-guava-failureaccess-0:1.0.3-1.redhat_00001.1.el9eap
eap8-activemq-artemis-0:2.40.0-6.redhat_00012.1.el9eap
eap8-netty-transport-native-epoll-0:4.1.132-1.Final_redhat_00001.1.el9eap
eap8-reactivex-rxjava-0:3.1.12-1.redhat_00001.1.el9eap
eap8-wildfly-openssl-0:2.3.0-1.Final_redhat_00001.1.el9eap
bcpkix-jdk15to18
eap8-jboss-metadata-0:16.1.0-1.Final_redhat_00001.1.el9eap
eap8-angus-0:2.0.5-1.redhat_00001.1.el9eap
eap8-plexus-utils-0:3.6.1-1.redhat_00001.1.el9eap
bcpkix-fips

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

Fixed versions

RHSA-2026:14276

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-2026:14276 (`sudo dnf update` / `yum update`).

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

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