{"id":"CVE-2026-54174","aliases":["GHSA-fpg8-7664-jc5q","GO-2026-5968"],"url":"https://o3.security/vulnerability/CVE-2026-54174","summary":"melange: Incomplete package integrity verification allows data section substitution","details":"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.","published":"2026-09-11T21:05:30.789Z","modified":"2026-10-21T02:58:32.311945812Z","cvss":{"score":8.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H"},"epss":{"score":0.00105,"percentile":0.01196,"asOf":"2026-09-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"chainguard.dev/apko","fixedVersion":"1.2.9"},{"ecosystem":"Go","name":"chainguard.dev/melange","fixedVersion":"0.50.4"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54174.json"},{"type":"ADVISORY","url":"https://github.com/chainguard-dev/melange/security/advisories/GHSA-fpg8-7664-jc5q"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54174"},{"type":"PACKAGE","url":"https://github.com/chainguard-dev/melange"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-21T02:58:32.311945812Z"}}