go-git improperly verifies data integrity values for .idx and .pack files_CVE-2026-25934

{
    "lastseen": "",
    "description": "go-git is a highly extensible git implementation library written in pure Go. Prior to 5.16.5, a vulnerability was discovered in go-git whereby data integrity values for .pack and .idx files were not properly verified. This resulted in go-git potentially consuming corrupted files, which would likely result in unexpected errors such as object not found. For context, clients fetch packfiles from upstream Git servers. Those files contain a checksum of their contents, so that clients can perform integrity checks before consuming it. The pack indexes (.idx) are generated locally by go-git, or the git cli, when new .pack files are received and processed. The integrity checks for both files were not being verified correctly. This vulnerability is fixed in 5.16.5.",
    "published": "2026-02-09T22:13:41.974Z",
    "modified": "2026-02-09T22:13:41.974Z",
    "type": "cve",
    "title": "go-git improperly verifies data integrity values for .idx and .pack files",
    "source": "GitHub_M",
    "references": "https://github.com/go-git/go-git/security/advisories/GHSA-37cx-329c-33x3\nhttps://github.com/go-git/go-git/releases/tag/v5.16.5",
    "id": "CVE-2026-25934",
    "bulletinFamily": "",
    "cwe": [
        "CWE-354"
    ],
    "cvelist": null,
    "sourceData": "go-git go-git < 5.16.5",
    "sourceHref": "",
    "cvss": {
        "score": 4.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
        "version": "3.1"
    },
    "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": "go-git",
    "version": "< 5.16.5",
    "vendor": "go-git",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}