CVE-2026-113429
No CVSS score yet. EPSS 0.2% estimated probability of exploitation activity in the next 30 days.
Legacy (v1 to v3) Actions artifact uploads stored the request's `Content-Encoding` header unchecked in the column that is served as the artifact's `Content-Type` on download, and a value starting with `video/` or `audio/` also removed the sandboxing Content-Security-Policy. A user who can run an Actions job could upload an artifact that a browser renders as HTML on the Gitea origin when the direct artifact download URL is opened, and the URL is reachable anonymously on public repositories. A victim who opens the link runs the attacker's script with their own session, which for an administrator means control of the instance. Legacy uploads now store only the `gzip` marker, and the special serve headers are chosen only for valid media types.
- EPSS
- 0.2% estimated probability of exploitation activity in the next 30 days; 14th percentile. Scored 2026-11-01. A forecast for this CVE across the internet, not for your own systems.
- CWE
- CWE-79 Improper Neutralization of Input During Web Page Generation (Cross-site Scripting)
- Published
- Modified
- Record from
- the NVD, synced
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