logback: ACE vulnerability in configuration file processing by QOS.CH logback-core up to and including version 1.5.24 in Java...
CVE-2026-1225 is fixed in logback on 1 platform, first by DEBIAN-CVE-2026-1225, released January 22, 2026. It is not reported as exploited. Patch Radar priority: Routine.
ACE vulnerability in configuration file processing by QOS.CH logback-core up to and including version 1.5.24 in Java applications, allows an attacker to instantiate classes already present on the class path by compromising an existing logback configuration file. The instantiation of a potentially malicious Java class requires that said class is present on the user's class-path. In addition, the attacker must have write access to a configuration file. However, after successful instantiation, the instance is very likely to be discarded with no further ado.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| logback · Debian 14 | 1:1.6.3-1 | DEBIAN-CVE-2026-1225 | Jan 22, 2026 |
| logback · opensuse-leap 15.6 | 1.2.13-150200.3.16.1 | SUSE-SU-2026:0361-1 | Feb 2, 2026 |
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