{"id":"CVE-2026-52798","state":"PUBLISHED","title":"Gogs: Stored XSS in `.ipynb` Preview","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.","publishedAt":"2026-06-24T20:14:13.965Z","updatedAt":"2026-06-25T17:15:43.282Z","severity":{"score":8.9,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["gogs gogs"],"affected":[{"vendor":"gogs","product":"gogs","versions":[{"version":"< 0.14.3","status":"affected"}]}],"references":["https://github.com/gogs/gogs/security/advisories/GHSA-jq8v-rmf6-65jw","https://github.com/gogs/gogs/pull/8319","https://github.com/gogs/gogs/commit/17b168b11ca759a7550e1f4bbd68bbde14db7785","https://github.com/gogs/gogs/releases/tag/v0.14.3"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/52xxx/CVE-2026-52798.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52798","state":"PUBLISHED","datePublished":"2026-06-24T20:14:13.965Z","dateUpdated":"2026-06-25T17:15:43.282Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-08T18:02:19.731Z"},"containers":{"cna":{"title":"Gogs: Stored XSS in `.ipynb` Preview","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"gogs","product":"gogs","versions":[{"version":"< 0.14.3","status":"affected"}]}],"references":[{"url":"https://github.com/gogs/gogs/security/advisories/GHSA-jq8v-rmf6-65jw","name":"https://github.com/gogs/gogs/security/advisories/GHSA-jq8v-rmf6-65jw","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/gogs/gogs/pull/8319","name":"https://github.com/gogs/gogs/pull/8319","tags":["x_refsource_MISC"]},{"url":"https://github.com/gogs/gogs/commit/17b168b11ca759a7550e1f4bbd68bbde14db7785","name":"https://github.com/gogs/gogs/commit/17b168b11ca759a7550e1f4bbd68bbde14db7785","tags":["x_refsource_MISC"]},{"url":"https://github.com/gogs/gogs/releases/tag/v0.14.3","name":"https://github.com/gogs/gogs/releases/tag/v0.14.3","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":8.9,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-24T20:14:13.965Z"},"source":{"advisory":"GHSA-jq8v-rmf6-65jw","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/gogs/gogs/security/advisories/GHSA-jq8v-rmf6-65jw","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-25T17:14:47.335180Z","id":"CVE-2026-52798","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-25T17:15:43.282Z"}}]}}}