go-git: Improper parsing of specially crafted objects may lead to inconsistent interpretation compared to upstream Git_CVE-2026-45022

{
    "lastseen": "",
    "description": "go-git is an extensible git implementation library written in pure Go. Prior to 5.19.0 and 6.0.0-alpha.3, go-git may parse malformed Git objects in a way that differs from upstream Git. When commit or tag objects contain ambiguous or malformed headers, go-git\u2019s decoded representation may expose values differently from how Git itself would interpret or reject the same object. Additionally, go-git\u2019s commit signing and verification logic operates over commit data reconstructed from go-git\u2019s parsed representation rather than the original raw object bytes. As a result, go-git may sign or verify a commit payload that is not byte-for-byte equivalent to the object stored in the repository. This can cause a signature to appear valid for a commit whose displayed or effective metadata differs from the object that was intended to be signed. This vulnerability is fixed in 5.19.0 and 6.0.0-alpha.3.",
    "published": "2026-05-27T14:54:47.872Z",
    "modified": "2026-05-27T15:43:32.693Z",
    "type": "cve",
    "title": "go-git: Improper parsing of specially crafted objects may lead to inconsistent interpretation compared to upstream Git",
    "source": "GitHub_M",
    "references": "https://github.com/go-git/go-git/security/advisories/GHSA-389r-gv7p-r3rp",
    "id": "CVE-2026-45022",
    "bulletinFamily": "",
    "cwe": [
        "CWE-180",
        "CWE-345"
    ],
    "cvelist": null,
    "sourceData": "go-git go-git < 5.19.0\ngo-git go-git >= 6.0.0-alpha.1, < 6.0.0-alpha.3",
    "sourceHref": "",
    "cvss": {
        "score": 7,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N",
        "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": "",
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            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "go-git",
    "version": "< 5.19.0",
    "vendor": "go-git",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}