# CVE-2026-54174

## Summary

- **CVE ID:** CVE-2026-54174
- **Severity:** HIGH
- **CVSS Score:** 8.3 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H)
- **CWE:** CWE-354, CWE-345
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 11, 2026

## Description

melange allows users to build apk packages using declarative pipelines. Apko prior to version 1.2.9, corresponding to melange prior to version 0.50.4, verified the control section hash (`.PKGINFO` etc.) against the signed `APKINDEX`, but never verified the data section hash (the actual package files that get installed). An attacker who could compromise a mirror, poison a cache, or MITM a package fetch could substitute arbitrary file contents while the control hash check still passed. Apko version 1.2.9 and melange version 0.50.4 contain a fix.

## Affected Products

- chainguard-dev — melange (< 0.50.4)
- chainguard-dev — apko (< 1.2.9)

## References

- [CNA](https://github.com/chainguard-dev/melange/security/advisories/GHSA-fpg8-7664-jc5q)

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-12._