Gogs: Stored XSS in `.ipynb` Preview_CVE-2026-52798

{
    "lastseen": "",
    "description": "Gogs is an open source self-hosted Git service. Prior to 0.14.3, although .ipynb previews are sanitized on the server side via /-/api/sanitize_ipynb, the inserted content is re-rendered on the client side without sanitization using marked() on elements with the .nb-markdown-cell class. During this process, links containing schemes such as javascript: can be regenerated. As a result, when a victim views an attacker-crafted .ipynb file and clicks the link, arbitrary JavaScript is executed in the Gogs origin, leading to a click-based Stored XSS. This vulnerability is fixed in 0.14.3.",
    "published": "2026-06-24T20:14:13.965Z",
    "modified": "2026-06-24T20:14:13.965Z",
    "type": "cve",
    "title": "Gogs: Stored XSS in `.ipynb` Preview",
    "source": "GitHub_M",
    "references": "https://github.com/gogs/gogs/security/advisories/GHSA-jq8v-rmf6-65jw\nhttps://github.com/gogs/gogs/pull/8319\nhttps://github.com/gogs/gogs/commit/17b168b11ca759a7550e1f4bbd68bbde14db7785\nhttps://github.com/gogs/gogs/releases/tag/v0.14.3",
    "id": "CVE-2026-52798",
    "bulletinFamily": "",
    "cwe": [
        "CWE-79"
    ],
    "cvelist": null,
    "sourceData": "gogs gogs < 0.14.3",
    "sourceHref": "",
    "cvss": {
        "score": 8.9,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L",
        "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": "gogs",
    "version": "< 0.14.3",
    "vendor": "gogs",
    "ai_description": "Stored XSS in .ipynb Preview via unsanitized client-side rendering",
    "ai_severity": "High",
    "ai_vendor": "Gogs",
    "ai_product": "Gogs",
    "ai_version": "< 0.14.3",
    "ai_score": 8.9
}