Lockfile checksums not verified in Hex allows dependency integrity bypass_CVE-2026-32148

{
    "lastseen": "",
    "description": "Insufficient Verification of Data Authenticity vulnerability in hexpm hex (Hex.RemoteConverger module) allows dependency integrity bypass via unverified lockfile checksums.\n\nHex stores checksums for dependencies in the mix.lock file to ensure reproducible and integrity-checked builds. However, Hex.RemoteConverger.verify_resolved/2 never executes checksum verification because the lock data returned by Hex.Utils.lock/1 uses string-based dependency names, while the verification logic compares against atom-based names. This type mismatch causes the verification code path to be silently skipped. Checksums are still validated when packages are initially downloaded from the registry, but mismatches between the lockfile and resolved dependencies are not detected.\n\nAn attacker who can influence cached packages (e.g., via local cache poisoning or a compromised registry) can provide modified dependency contents that will be accepted without detection. The mix.lock file is silently rewritten with the checksum values from the registry, erasing evidence of tampering.\n\nThis issue affects hex: from 0.16.0 before 2.4.2.",
    "published": "2026-04-30T18:17:03.783Z",
    "modified": "2026-04-30T19:03:24.858Z",
    "type": "cve",
    "title": "Lockfile checksums not verified in Hex allows dependency integrity bypass",
    "source": "EEF",
    "references": "https://github.com/hexpm/hex/security/advisories/GHSA-hmv9-4mfr-m92v\nhttps://cna.erlef.org/cves/CVE-2026-32148.html\nhttps://osv.dev/vulnerability/EEF-CVE-2026-32148\nhttps://github.com/hexpm/hex/commit/d7528c8199a1144511508bf3a6460026a5a14c8e",
    "id": "CVE-2026-32148",
    "bulletinFamily": "",
    "cwe": [
        "CWE-354",
        "CWE-494"
    ],
    "cvelist": null,
    "sourceData": "hexpm hex 0.16.0\nhexpm hex e01576f28c64af9fae6eb17e2dad30f6efcb303c",
    "sourceHref": "",
    "cvss": {
        "score": 8.9,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "hex",
    "version": "0.16.0",
    "vendor": "hexpm",
    "ai_description": "Insufficient Verification of Data Authenticity vulnerability in hexpm hex allows dependency integrity bypass via unverified lockfile checksums",
    "ai_severity": "High",
    "ai_vendor": "hexpm",
    "ai_product": "hex",
    "ai_version": "0.16.0-2.4.2",
    "ai_score": 8.9
}