Medium5.9Red Hat Linux

Medium [CVE-2026-34500] Authentication bypass via client certificate misconfiguration

This medium-severity Red Hat Linux advisory covers CVE-2026-34500 affecting Red Hat Enterprise Linux 1, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.

CVE-2026-34500 Published Apr 9, 2026

CVE-2026-34500

Affected products & platforms

Red Hat LinuxUnclassified

Open vendor advisory

Android app · Google Play

Monitor future Red Hat Linux CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.

Matching phone alertsOptional email delivery

Get CVE alerts See app features

Summary

Authentication bypass via client certificate misconfiguration. Red Hat rates this moderate (CVSS 5.9).

Weakness: CWE-303. Affected package(s): tomcat, jws6-tomcat.

Resolved in Red Hat advisory RHSA-2026:20405 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.

Affected versions

tomcat
jws6-tomcat-0:10.1.49-13.redhat_00011.1.el10jws
jws6-tomcat-0:10.1.49-13.redhat_00011.1.el8jws
jws6-tomcat-0:10.1.49-13.redhat_00011.1.el9jws

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

Fixed versions

RHSA-2026:20405

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-2026:20405 (`sudo dnf update` / `yum update`).

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

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.