{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-54174", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-11T21:46:52.381Z", "datePublished": "2026-09-11T21:05:30.789Z", "dateUpdated": "2026-09-14T16:19:01.111Z"}, "containers": {"cna": {"title": "melange: Incomplete package integrity verification allows data section substitution", "problemTypes": [{"descriptions": [{"cweId": "CWE-354", "lang": "en", "description": "CWE-354: Improper Validation of Integrity Check Value", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-345", "lang": "en", "description": "CWE-345: Insufficient Verification of Data Authenticity", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.3, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/chainguard-dev/melange/security/advisories/GHSA-fpg8-7664-jc5q", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/chainguard-dev/melange/security/advisories/GHSA-fpg8-7664-jc5q"}], "affected": [{"vendor": "chainguard-dev", "product": "melange", "versions": [{"version": "< 0.50.4", "status": "affected"}]}, {"vendor": "chainguard-dev", "product": "apko", "versions": [{"version": "< 1.2.9", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-11T21:05:30.789Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-fpg8-7664-jc5q", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-14T16:18:49.717621Z", "id": "CVE-2026-54174", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-14T16:19:01.111Z"}}]}}

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{"affected": [{"affectedData": [{"product": "melange", "vendor": "chainguard-dev", "versions": [{"status": "affected", "version": "< 0.50.4"}]}, {"product": "apko", "vendor": "chainguard-dev", "versions": [{"status": "affected", "version": "< 1.2.9"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-54174", "lastModified": "2026-09-30T19:57:08.043", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.3, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 6.0, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-54174", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-14T16:18:49.717621Z", "version": "2.0.3"}}]}, "published": "2026-09-11T21:17:11.403", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/chainguard-dev/melange/security/advisories/GHSA-fpg8-7664-jc5q"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-345"}, {"lang": "en", "value": "CWE-354"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

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