What is CVE-2026-54174?

CVE-2026-54174 is a high-severity vulnerability in Chainguard-Dev Apko, classified under Insufficient Verification of Data Authenticity. CVSS score: 8.3/10. Published 2026-09-11.

How severe is CVE-2026-54174?

High severity. CVSS v3 base score is 8.3 out of 10.

Vulnerability in Chainguard-Dev Apko

CVE-2026-54174

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.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Chainguard-dev Apko — versions < 1.2.9
Chainguard-dev Melange — versions < 0.50.4

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-54174?: CVE-2026-54174 is a high-severity vulnerability in Chainguard-Dev Apko, classified under Insufficient Verification of Data Authenticity. CVSS score: 8.3/10. Published 2026-09-11.
How severe is CVE-2026-54174?: High severity. CVSS v3 base score is 8.3 out of 10.