CVE-2026-52798

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.

• CWE-79

• 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

Published

Jun 24, 2026

Last Modified

Jun 25, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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