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CVE-2026-19880

Incomplete protection against CVE-2025-11226

MEDIUM
6.3
CVSS Score
Published: August 14, 2026 at 02:31 PM UTC
Updated: August 26, 2026 at 04:51 PM UTC
1 product affected across 1 vendorLogback-classic

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Severity
MEDIUM6.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Logback-classic· Qos Ch Sarl
60%
0.9.14 ≤ v ≤ 1.6.20.9.14
Vendor states this is fixed in 1.6.3 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://logback.qos.ch/news.html#1.6.3

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.3MEDIUMNCSC.ch
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-22

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