VDB
CVE-2026-19880
CVE-2026-19880
PUBLISHED
CVSS 6.3 MEDIUM
Reported by NCSC.ch · Published August 14, 2026
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.
Risk Scores
CVSS 4.0
6.3
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/S:P/AU:N/RE:M/U:Green
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| QOS.CH Sarl | Logback-classic | 0.9.14, 1.6.3 |
| QOS.CH Sarl | Logback-classic | 0.9.14, 1.6.3 |
Timeline
- Aug 14, 2026 CVE Published
- Aug 14, 2026 CVE Updated
- Aug 15, 2026 Coalition ESS Score
- Aug 24, 2026 EPSS Score
- Aug 26, 2026 EPSS Score
- Aug 30, 2026 EPSS Score
- Sep 4, 2026 EPSS Score
- Sep 6, 2026 Security Advisory
- Sep 9, 2026 EPSS Score
- Sep 12, 2026 EPSS Score
- Sep 16, 2026 EPSS Score