MEDIUM

CVE-2026-52816

2026-06-24 CVSS v4.0

CVSS

5.4

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.

Weakness (CWE)

CWE-80

EPSS Score

0.68%

Probability of exploitation in next 30 days

50.8th percentile

References

https://github.com/gogs/gogs/commit/dd1bd9837aa196b3ed3a8ee21e5727b5d7a986a3 https://github.com/gogs/gogs/pull/8326 https://github.com/gogs/gogs/releases/tag/v0.14.3 https://github.com/gogs/gogs/security/advisories/GHSA-3w28-36p9-w929

View on dbcve.org

Base CVE data derived from NVD (public domain). Enrichment by dbcve.org (CC-BY-4.0). Fetched via API.

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