MEDIUM 6.3 NVD

CVE-2026-104721

Path-traversal vulnerability in QOS.CH Sarl Logback-classic on Java (logback-classic module) allows path-traversal vulnerability. More specifically, an MDC-bas

Path-traversal vulnerability in QOS.CH Sarl Logback-classic on Java (logback-classic module) allows path-traversal vulnerability. More specifically, an MDC-based discriminator value flows unsanitized into a nested FileAppender path, letting an attacker who influences that MDC value (e.g. via an HTTP header) create and append log files outside the intended directory. This issue affects Logback-classic: from 0.9.14 through 1.6.4. This vulnerability is similar to CVE-2026-19880 but involves other attack techniques.

References

https://logback.qos.ch/news.html#1.6.5

Published: 2026-10-02 · Source: NVD · Feed updated: 2026-10-02

This medium severity vulnerability with a CVSS score of 6.3 was published on 2026-10-02 via NVD.

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