# CVE-2026-25143: melange affected by potential host command execution via license-check YAML mode patch pipeline

Source: https://junglewise.ai/threats/cve-2026-25143-melange-affected-by-potential-host-command-execution-via-license  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-02-05  
License: CC BY 4.0 with a link back

CVE-2026-25143 · Severity: low · CVSS 3.1 · Published 2026-02-05

melange affected by potential host command execution via license-check YAML mode patch pipeline in chainguard.dev/melange

Technologies: [chainguard.dev/melange (Go)](https://junglewise.ai/threats/technologies/chainguard-dev-melange). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2026-25143 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-25143 being exploited in the wild.

**How severe is CVE-2026-25143?** Low severity, with a CVSS score of 3.1, published 5 February 2026.

**Which products and versions are affected?** chainguard.dev/melange (Go) SEMVER:introduced=0.10.0,fixed=0.40.3.

**Is there a fix for CVE-2026-25143?** Yes. chainguard.dev/melange (Go): upgrade to 0.40.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-25143?** Check whether you run chainguard.dev/melange (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- chainguard.dev/melange (Go): upgrade to 0.40.3 or later

  ```sh
  go get chainguard.dev/melange@v0.40.3
  ```


## Affected products

- chainguard.dev/melange (Go) SEMVER:introduced=0.10.0,fixed=0.40.3

## Identifiers

- CVE-2026-25143
- GHSA-rf4g-89h5-crcr
- GO-2026-4412

## Related threats

- [Chainguard Melange and Apko incomplete package integrity verification](https://junglewise.ai/threats/cve-2026-54174-chainguard-melange-and-apko-incomplete-package-integrity)
- [GO-2026-5562 - melange has Path Traversal via .PKGINFO in --persist-lint-results in chainguard.dev/melange](https://junglewise.ai/threats/cve-2026-29051-melange-has-path-traversal-via-pkginfo-in-persist-lint-results)
- [melange has Path Traversal When Resolving External Pipelines via Unvalidated pipeline[].uses](https://junglewise.ai/threats/cve-2026-29050-melange-has-path-traversal-when-resolving-external-pipelines-via)
- [Chainguard melange resource exhaustion in update-cache](https://junglewise.ai/threats/cve-2026-29049-chainguard-melange-resource-exhaustion-in-update-cache)
- [melange has a path traversal in license-path which allows reading files outside workspace](https://junglewise.ai/threats/cve-2026-25145-melange-has-a-path-traversal-in-license-path-which-allows-reading)