# CVE-2025-11226: Conditional processing of logback.xml configuration file, in conjuction with Spring Framework and Janino

> CVE-2025-11226: Conditional processing of logback.xml configuration file, in conjuction with Spring Framework and Janino. CVSS 7.0 (CVSS 4.0).

Canonical: https://rewindex.com/cve/CVE-2025-11226
Last updated: 2026-10-09T09:10:00Z

- Published: 2025-10-01 07:26 UTC · Updated: 2026-10-09 09:10 UTC · Assigner: NCSC.ch
- CVSS: 7.0 (CVSS 4.0) · Severity: High
- EPSS: 0.19%, 9th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-20

## 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.

## Affected vendors and products

- QOS.CH Sarl: Logback-core

## Tracked companies

- [Confluence](https://rewindex.com/company/confluence.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-11226)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-11226)
- [https://logback.qos.ch/news.html\#1.3.16](https://logback.qos.ch/news.html#1.3.16)
- [https://logback.qos.ch/news.html\#1.5.19](https://logback.qos.ch/news.html#1.5.19)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-11226 · Markdown: https://rewindex.com/cve/CVE-2025-11226.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-11226 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:10:53.398Z