Gitea: Cross-Repository Authorization Bypass via Release Attachment Linking Leads to Private Attachment Disclosure_CVE-2026-20912

{
    "lastseen": "",
    "description": "Gitea does not properly validate repository ownership when linking attachments to releases. An attachment uploaded to a private repository could potentially be linked to a release in a different public repository, making it accessible to unauthorized users.",
    "published": "2026-01-22T22:01:52.026Z",
    "modified": "2026-01-23T21:53:41.649Z",
    "type": "cve",
    "title": "Gitea: Cross-Repository Authorization Bypass via Release Attachment Linking Leads to Private Attachment Disclosure",
    "source": "Gitea",
    "references": "https://github.com/go-gitea/gitea/security/advisories/GHSA-vfmv-f93v-37mw\nhttps://github.com/go-gitea/gitea/pull/36320\nhttps://github.com/go-gitea/gitea/pull/36355\nhttps://github.com/go-gitea/gitea/releases/tag/v1.25.4\nhttps://blog.gitea.com/release-of-1.25.4/",
    "id": "CVE-2026-20912",
    "bulletinFamily": "",
    "cwe": [
        "CWE-284",
        "CWE-639"
    ],
    "cvelist": null,
    "sourceData": "Gitea Gitea Open Source Git Server 0",
    "sourceHref": "",
    "cvss": {
        "score": 9.1,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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": "Gitea Open Source Git Server",
    "version": "0",
    "vendor": "Gitea",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}