Vulnocalypse
Back to feed
30impact

Logback: Incomplete protection against CVE-2026-19880

QOS.CH Sarl Logback-classic · CVE-2026-104721
0 news outlets0 CERTs and agencies0 researchers

What is it?

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.

Evidence

No coverage recorded yet.

Exploitation

  • Public proof of concept
  • Exploited in the wild
  • Listed as known exploited
CVSS
6.3
EPSS
0.3%
First seen
7 d ago
Status
corroborated

All QOS.CH Sarl vulnerabilities