PatchTheCVElog4cxx vulnerabilities and fixes
Recent CVEs affecting log4cxx, with upgrade or downgrade steps. 1 tracked.
log4cxx has 1 tracked vulnerability, 0 critical. A fixed release or vendor patch exists for 1. Most recent: 2026-04-10. Highest priority: CVE-2026-40023 (score 39/100).
- CVE-2026-40023 MEDIUM 5.3 UPGRADE Apache Log4cxx's XMLLayout https://logging.apache.org/log4cxx/1.7.0/classlog4cxx_1_1xml_1_1XMLLayout.html , i
FAQ
How do I fix log4cxx vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is log4cxx being exploited right now?
None of the tracked log4cxx CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which log4cxx CVE should I patch first?
CVE-2026-40023 currently ranks highest (39/100): Apache Log4cxx's XMLLayout https://logging.apache.org/log4cxx/1.7.0/classlog4cxx_1_1xml_1_1XMLLayout.html , i.