Medium severityNVD Advisory· Published Jun 24, 2026· Updated Jun 25, 2026
CVE-2026-52816
CVE-2026-52816
Description
Gogs is an open source self-hosted Git service. Prior to 0.14.3, the Jupyter Notebook (ipynb) sanitizer endpoint at POST /-/api/sanitize_ipynb allows arbitrary data: URIs without proper restrictions, potentially leading to Cross-Site Scripting (XSS). The endpoint uses bluemonday.UGCPolicy() with p.AllowURLSchemes("data") which permits all data URI schemes including data:text/html, enabling attackers to inject malicious HTML/JavaScript. Additionally, the endpoint has no authentication middleware, allowing any registered user to exploit this vulnerability. This vulnerability is fixed in 0.14.3.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
gogs.io/gogsGo | < 0.14.3 | 0.14.3 |
Affected products
2- osv-coordsRange: < 0.0.20260723T184607-160000.1.1
Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-3w28-36p9-w929ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-52816ghsaADVISORY
- github.com/gogs/gogs/commit/dd1bd9837aa196b3ed3a8ee21e5727b5d7a986a3nvdWEB
- github.com/gogs/gogs/pull/8326nvdWEB
- github.com/gogs/gogs/releases/tag/v0.14.3nvdWEB
- github.com/gogs/gogs/security/advisories/GHSA-3w28-36p9-w929nvdWEB
News mentions
1- Gogs: 18 Vulnerabilities Including RCE and Auth Bypass Disclosed in BatchVypr Intelligence · Jun 24, 2026