TI-2026-20043 Aliases CVE-2026-24844 GHSA-vqqr-rmpc-hhg2

melange pipeline working-directory could allow command injection

LOW 39CWE-78Published 2026-02-04 · Updated 2026-02-05

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-78.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00198 9th percentileScored 2026-11-07

Fix Fixed melange (chainguard-dev): 0.40.3chainguard.dev/melange (Go): 0.40.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
chainguard-dev	melange	0.3.0 to before 0.40.3	0.40.3	Patch available	CNA
—	chainguard.dev/melange (Go)	0.3.0 to before 0.40.3	0.40.3	Patch available	GHSA-vqqr-rmpc-hhg2

melange Vendorchainguard-dev Affected 0.3.0 to before 0.40.3 Fixed in 0.40.3 Patch available CNA
chainguard.dev/melange (Go) Vendor— Affected 0.3.0 to before 0.40.3 Fixed in 0.40.3 Patch available GHSA-vqqr-rmpc-hhg2

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:chainguard:melange::::::go::*	0.3.0 – 0.40.5	Vulnerable	chainguard-dev

cpe:2.3:a:chainguard:melange:*:*:*:*:*:go:*:* Versions 0.3.0 – 0.40.5 Vulnerable ·chainguard-dev

Remediation

Fix · CNA melange (chainguard-dev) Fixed in 0.40.3
Fix · GHSA-vqqr-rmpc-hhg2 chainguard.dev/melange (Go) Fixed in 0.40.3 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-24844
2026-10-03 Alias added: GHSA-vqqr-rmpc-hhg2

References

Patch 2

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-24844

Other 1

https://github.com/chainguard-dev/melange

TI-2026-20042 melange QEMU runner could write files outside workspace directory CVSS 3.1HIGH 8.4
TI-2026-20305 melange affected by potential host command execution via license-check YAML mode patch pipeline CVSS 3.1HIGH 7.8
TI-2026-23195 melange has Path Traversal When Resolving External Pipelines via Unvalidated pipeline[].uses CVSS 3.1MEDIUM 6.1
TI-2026-20307 melange has a path traversal in license-path which allows reading files outside workspace CVSS 3.1MEDIUM 5.5
TI-2026-23196 melange has Path Traversal via .PKGINFO in --persist-lint-results CVSS 3.1MEDIUM 4.4
TI-2026-23194 melange: unbounded HTTP download in `melange update-cache` can exhaust disk in CI CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences