# CVE-2025-11226: logback: ACE vulnerability in conditional configuration file processing  by QOS.CH logback-core up to and including version 1....

CVE-2025-11226 is fixed in logback on 1 platform, first by DEBIAN-CVE-2025-11226, released October 1, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-11226
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 1, 2025

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | logback Debian 14 | 1:1.6.3-1 | [DEBIAN-CVE-2025-11226](https://patchblox.com/security/data/fix/linux/debian-cve-2025-11226.md) | Oct 1, 2025 |
| Linux | logback opensuse-leap 15.6 | 1.2.13-150200.3.13.1 | [SUSE-SU-2025:03456-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-03456-1.md) | Oct 7, 2025 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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