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Details of issue NIXPKGS-2026-0092

NIXPKGS-2026-0092
published on
Permalink CVE-2026-24843
8.2 HIGH
  • CVSS version: 3.1
  • Attack vector (AV): LOCAL
  • Attack complexity (AC): LOW
  • Privileges required (PR): NONE
  • User interaction (UI): REQUIRED
  • Scope (S): CHANGED
  • Confidentiality impact (C): NONE
  • Integrity impact (I): HIGH
  • Availability impact (A): HIGH
updated 2 months ago by @LeSuisse Activity log
  • Created automatic suggestion 2 months ago
  • @LeSuisse removed package ocamlPackages.melange 2 months ago
  • @LeSuisse removed package ocamlPackages.melange-json 2 months ago
  • @LeSuisse removed package ocamlPackages.melange-json-native 2 months ago
  • @LeSuisse removed package ocamlPackages_latest.melange 2 months ago
  • @LeSuisse removed package ocamlPackages_latest.melange-json 2 months ago
  • @LeSuisse removed package ocamlPackages_latest.melange-json-native 2 months ago
  • @LeSuisse accepted 2 months ago
  • @LeSuisse published on GitHub 2 months ago
melange QEMU runner could write files outside workspace directory

melange allows users to build apk packages using declarative pipelines. In version 0.11.3 to before 0.40.3, an attacker who can influence the tar stream from a QEMU guest VM could write files outside the intended workspace directory on the host. The retrieveWorkspace function extracts tar entries without validating that paths stay within the workspace, allowing path traversal via ../ sequences. This issue has been patched in version 0.40.3.

Affected products

melange
  • ==>= 0.11.3, < 0.40.3

Matching in nixpkgs

Package maintainers

Upstream advisory: https://github.com/chainguard-dev/melange/security/advisories/GHSA-qxx2-7h4c-83f4
Upstream patch: https://github.com/chainguard-dev/melange/commit/6e243d0d46699f837d7c392397a694d2bcc7612b