CVE-2025-11226

Name	CVE-2025-11226
Description	ACE vulnerability in conditional configuration file processing by QOS.CH logback-core up to and including version 1.5.18 in Java applications, allows an attacker to execute arbitrary code by compromising an existing logback configuration file or by injecting an environment variable before program execution. A successful attack requires the presence of Janino library and Spring Framework to be present on the user's class path. In addition, the attacker must have write access to a configuration file. Alternatively, the attacker could inject a malicious environment variable pointing to a malicious configuration file. In both cases, the attack requires existing privilege.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
logback (PTS)	bullseye	1:1.2.3-6	fixed
	bookworm	1:1.2.11-3	fixed
	forky, sid, trixie	1:1.2.11-6	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
logback	source	(unstable)	(not affected)

Notes

- logback <not-affected> (Vulnerable code introduced later)
https://logback.qos.ch/news.html#1.5.19
Introduced with https://github.com/qos-ch/logback/commit/1e869ae6172e34ad1f74ddba62d56991ada64173 (v_1.3.0-alpha15)
Fixed by: https://github.com/qos-ch/logback/commit/61f6a2544f36b3016e0efd434ee21f19269f1df7 (v_1.5.19)