CVE-2026-25143

melange allows users to build apk packages using declarative pipelines. From version 0.10.0 to before 0.40.3, an attacker who can influence inputs to the patch pipeline could execute arbitrary shell commands on the build host. The patch pipeline in pkg/build/pipelines/patch.yaml embeds input-derived values (series paths, patch filenames, and numeric parameters) into shell scripts without proper quoting or validation, allowing shell metacharacters to break out of their intended context. The vulnerability affects the built-in patch pipeline which can be invoked through melange build and melange license-check operations. An attacker who can control patch-related inputs (e.g., through pull request-driven CI, build-as-a-service, or by influencing melange configurations) can inject shell metacharacters such as backticks, command substitutions $(…), semicolons, pipes, or redirections to execute arbitrary commands with the privileges of the melange build process. This issue has been patched in version 0.40.3.

The following products are affected by CVE-2026-25143 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-25143.

URL	Resource
https://github.com/chainguard-dev/melange/commit/bd132535cd9f57d4bd39d9ead0633598941af030
https://github.com/chainguard-dev/melange/security/advisories/GHSA-rf4g-89h5-crcr