CVE-2026-105239
CVE-2026-105239: 1 tracked advisory record across Apache. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Apache
1 advisory- Advisory severityMedium5.3
Medium [CVE-2026-105239] Improper Neutralization of Null Byte or NUL Character vulnerability in the EventLogAppender of Apache log4net
CVE-2026-105239Source published Source updated
Improper Neutralization of Null Byte or NUL Character vulnerability in the EventLogAppender of Apache log4net. A NUL character in logged content ended the Windows Event Log record at that point, so everything the layout rendered after it, including exception text and trailing fields, was silently not stored. A party whose data reaches a log message could hide the rest of that record. Only applications on Windows that use EventLogAppender are affected. This issue affects Apache log4net: from 1.2.9 before 3.5.0. Users are recommended to upgrade to version 3.5.0, which fixes the issue.
- Related products — impact not confirmed
- Apache log4net
- Source-reported affected versions
- 1.2.9 before 3.5.0
- Source-reported fixed versions
- 3.5.0
- Mitigation guidance
- Users are recommended to upgrade to version 3.5.0, which fixes the issue.
Android app · Google Play
Monitor future Apache 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.