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Vulnerability record · CVE-2026-24844 · published 4 February 2026

CVE-2026-24844: Chainguard melange os command injection vulnerability

Chainguard · Melange

melange allows users to build apk packages using declarative pipelines. From version 0.3.0 to before 0.40.3, an attacker who can provide build input values, but not modify pipeline definitions, could execute arbitrary shell commands if the pipeline uses ${{vars.*}} or ${{inputs.*}} substitutions in working-directory. The field is embedded into shell scripts without proper quote escaping. This issue has been patched in version 0.40.3.

8.8 CVSS 3.1 High EPSS 0.18% · top 92.9% CWE-78 · OS command injection
8.8CVSS 3.1 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

melange allows users to build apk packages using declarative pipelines. From version 0.3.0 to before 0.40.3, an attacker who can provide build input values, but not modify pipeline definitions, could execute arbitrary shell commands if the pipeline uses ${{vars.*}} or ${{inputs.*}} substitutions in working-directory. The field is embedded into shell scripts without proper quote escaping. This issue has been patched in version 0.40.3.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/chainguard-dev/melange/commit/e51ca30cfb63178f5a86997d23d3fff0359fa6c8 Patch
https://github.com/chainguard-dev/melange/security/advisories/GHSA-vqqr-rmpc-hhg2 PatchVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-24844), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.