Medium5.3Red Hat Linux

Medium [CVE-2026-34479] Apache Log4j 1-to-Log4j 2 bridge: Log processing denial of service due to improper XML escaping

This medium-severity Red Hat Linux advisory covers CVE-2026-34479 affecting offline-knowledge-portal/rhokp-rhel9:1779996999, Red Hat Enterprise Linux.

CVE-2026-34479 Published Apr 10, 2026

CVE-2026-34479

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

Apache Log4j 1-to-Log4j 2 bridge: Log processing denial of service due to improper XML escaping. Red Hat rates this moderate (CVSS 5.3).

Weakness: CWE-91. Affected package(s): offline-knowledge-portal/rhokp-rhel9:1779996999.

Resolved in Red Hat advisory RHSA-2026:21773 — update the affected packages (`sudo dnf update`).

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

Affected versions

offline-knowledge-portal/rhokp-rhel9:1779996999

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

Fixed versions

RHSA-2026:21773

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-2026:21773 (`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.