# CVE-2026-13006: logback: ACE vulnerability in conditional configuration file processing  by QOS.CH logback-core up to and including version 1....

CVE-2026-13006 is fixed in logback on 1 platform by DEBIAN-CVE-2026-13006 (version 1:1.6.3-1), released June 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-13006
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 24, 2026

## Description

ACE vulnerability in conditional configuration file processing  by QOS.CH logback-core up to and including version 1.5.36 in Java applications, allows an attacker to execute arbitrary code circumventing existing protections against CVE-2025-11226 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 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.  Please note that in logack version 1.5.37 conditional processing using Janino was removed.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | logback Debian 14 | 1:1.6.3-1 | [DEBIAN-CVE-2026-13006](https://patchblox.com/security/data/fix/linux/debian-cve-2026-13006.md) | Jun 24, 2026 |

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Data as of 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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