logback: Path-traversal vulnerability in QOS.CH Sarl Logback-classic on Java (logback-classic module) allows path-traversal vu...
CVE-2026-19880 is fixed in logback on 1 platform by DEBIAN-CVE-2026-19880 (version 1:1.6.3-1), released August 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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 1.6.2.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| logback · Debian 14 | 1:1.6.3-1 | DEBIAN-CVE-2026-19880 | Aug 14, 2026 |
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