{"cve":"CVE-2026-52798","nvd":{"published":"2026-06-24T21:16:55.533","modified":"2026-06-25T18:16:39.817","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L","score":8.9},"cwes":["CWE-79"],"references":["https://github.com/gogs/gogs/commit/17b168b11ca759a7550e1f4bbd68bbde14db7785","https://github.com/gogs/gogs/pull/8319","https://github.com/gogs/gogs/releases/tag/v0.14.3","https://github.com/gogs/gogs/security/advisories/GHSA-jq8v-rmf6-65jw","https://github.com/gogs/gogs/security/advisories/GHSA-jq8v-rmf6-65jw"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:41:17.107060303+00:00"},"epss":{"cve":"CVE-2026-52798","score":0.00429,"percentile":0.37203,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-jq8v-rmf6-65jw","url":"https://osv.dev/vulnerability/GHSA-jq8v-rmf6-65jw","summary":"Gogs has Stored XSS in `.ipynb` Preview","modified":"2026-07-21T13:30:31.803438481Z","packages":[{"ecosystem":"Go","name":"gogs.io/gogs","purl":"pkg:golang/gogs.io/gogs","ranges":["<0.14.3"],"fixed":["0.14.3"]}]},{"id":"GO-2026-5477","url":"https://osv.dev/vulnerability/GO-2026-5477","summary":"Gogs has Stored XSS in `.ipynb` Preview in gogs.io/gogs","modified":"2026-06-25T23:01:18.246744302Z","packages":[{"ecosystem":"Go","name":"gogs.io/gogs","purl":"pkg:golang/gogs.io/gogs","ranges":["all versions"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}