This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-19880 →

DEBIAN-CVE-2026-19880

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

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 logback

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 logback

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 logback

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.6.3-1"}]}]

References

advisory security-tracker.debian.org