CVE-2026-60008: Gitea Jupyter notebook UI redress through CSS class injection

Severity: low (CVSS 3.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-14 · updated 2026-10-14
Weakness: CWE-79

Description

Gitea's Jupyter notebook renderer inserts the notebook's language_info.name metadata into a CSS class attribute while disabling sanitization and rendering directly in the main document without an iframe sandbox. A malicious repository notebook can supply multiple CSS classes that create a viewport-covering overlay and intercept clicks when another user views it. The reported impact is UI redress; script execution was not demonstrated.

Affected products

Gitea Open Source Git Server: from 1.27.0 through 1.27.1

References

https://blog.gitea.com/release-of-1.27.2/
https://github.com/go-gitea/gitea/pull/38793
https://github.com/go-gitea/gitea/pull/38795
https://github.com/go-gitea/gitea/releases/tag/v1.27.2
https://github.com/go-gitea/gitea/security/advisories/GHSA-7452-653r-6gp8

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