Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Chainguard | Melange | >= 0.10.0, < 0.40.5 |
Related Weaknesses (CWE)
References
- https://github.com/chainguard-dev/melange/commit/bd132535cd9f57d4bd39d9ead063359Patch
- https://github.com/chainguard-dev/melange/security/advisories/GHSA-rf4g-89h5-crcPatchVendor Advisory
FAQ
What is CVE-2026-25143?
CVE-2026-25143 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 c...
How severe is CVE-2026-25143?
CVE-2026-25143 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-25143?
Check the references section above for vendor advisories and patch information. Affected products include: Chainguard Melange.