ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-19880

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

Published Aug 14, 2026 · catalog updated Oct 15, 2026 · Path-traversal vulnerability in QOS.CH

Check if you run it

No confirmed exploitation is on record for CVE-2026-19880. EPSS is 0.33%. Act only if a listed version of Path-traversal vulnerability in QOS.CH is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Path-traversal vulnerability in QOS.CH).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.33%
Remediation
Advisory link
Affected products
Debian:12 logback · Debian:13 logback · Debian:14 logback

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 logback1:1.2.11-3, 1:1.2.11-4, 1:1.2.11-5
  • Debian:13 logback1:1.2.11-6, 1:1.6.3-1, 1:1.6.3-2
  • Debian:14 logback0 → 1:1.6.3-1

How to fix CVE-2026-19880

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-19880. EPSS is 0.33%. Act only if a listed version of Path-traversal vulnerability in QOS.CH is installed.

Which versions are affected?

Compare what you have installed with 1:1.2.11-3, 1:1.2.11-4, 1:1.2.11-5, 1:1.2.11-6, 1:1.6.3-1, 1:1.6.3-2, 0 → 1:1.6.3-1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.33%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 14, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    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-clas

  2. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    logback fixed in 1:1.6.3-1

  3. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    logback fixed in 1:1.6.3-1

  4. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    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-clas

Sources

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.