CVE catalog

CVE-2026-19880

Path-traversal vulnerability in QOS.CH Sarl…

[CVE catalog]

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.

Severity
Medium · CVSS 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Published
Source
[NVD] · [CVE record]
EPSS
0.33% · Oct 27, 2026

Projects and upstream resources

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence
Original provider fields
{
  "package_releases": [
    {
      "name": "logback",
      "status": "fixed",
      "release": "sid",
      "version": "1:1.6.3-3"
    },
    {
      "name": "logback",
      "status": "fixed",
      "release": "forky",
      "version": "1:1.6.3-3"
    },
    {
      "name": "logback",
      "status": "vulnerable",
      "release": "trixie",
      "version": "1:1.2.11-6"
    },
    {
      "name": "logback",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "1:1.2.11-3"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1146719,
      "name": "logback",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "1:1.6.3-1"
    },
    {
      "bug": 1146719,
      "name": "logback",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "1:1.6.3-1"
    },
    {
      "bug": 1146719,
      "name": "logback",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1146719,
      "name": "logback",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": [
    {
      "name": "logback",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.5-1.1"
            }
          ]
        }
      ],
      "release": "tumbleweed",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "1.6.5-1.1",
      "provider_record_id": "OPENSUSE-SU-2026:11965-1"
    }
  ]
}

[Debian bug #1146719]

Publisher notes

[trixie] logback: Minor issue

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

  • [liblogback-java]Unknown

    Source package: [logback]

    Details (2)

    • 1:1.2.11-3 · all · bookworm

      Affected

      nvd · logback · debian · bookworm

    • 1:1.2.11-3 · all · bookworm

      Affected

      nvd · logback · debian · bookworm

  • [liblogback-java-doc]Unknown

    Source package: [logback]

    Details (2)

    • 1:1.2.11-3 · all · bookworm

      Affected

      nvd · logback · debian · bookworm

    • 1:1.2.11-3 · all · bookworm

      Affected

      nvd · logback · debian · bookworm

[openSUSE Tumbleweed]

  • [logback]Unknown

    Source package: [logback]

    Details (1)

    • 1.6.0-1.1 · noarch · tumbleweed

      Affected · Fixed: 1.6.5-1.1

      nvd · logback · opensuse · tumbleweed

  • [logback-access]Unknown

    Source package: [logback]

    Details (1)

    • 1.6.0-1.1 · noarch · tumbleweed

      Unknown · Fixed: 1.6.5-1.1

      Version impact unknown

      nvd · logback · opensuse · tumbleweed

  • [logback-examples]Unknown

    Source package: [logback]

    Details (1)

    • 1.6.0-1.1 · noarch · tumbleweed

      Unknown · Fixed: 1.6.5-1.1

      Version impact unknown

      nvd · logback · opensuse · tumbleweed

  • [logback-javadoc]Unknown

    Source package: [logback]

    Details (1)

    • 1.6.0-1.1 · noarch · tumbleweed

      Unknown · Fixed: 1.6.5-1.1

      Version impact unknown

      nvd · logback · opensuse · tumbleweed

Observed:

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]