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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Gitea | Gitea | unaffected |
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Project Subscriptions
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Advisories
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Fixes
Solution
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Workaround
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References
History
Sun, 01 Nov 2026 10:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Gitea stored XSS through legacy Actions artifact Content-Encoding | |
| Weaknesses | CWE-79 | |
| References |
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Projects
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MITRE
Status: PUBLISHED
Assigner: Gitea
Published:
Updated: 2026-11-01T09:48:32.206Z
Reserved: 2026-11-01T08:48:41.162Z
Link: CVE-2026-113429
Vulnrichment
No data.
NVD
Status : Deferred
Published: 2026-11-01T10:18:34.557
Modified: 2026-11-01T10:18:34.670
Link: CVE-2026-113429
Redhat
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OpenCVE Enrichment
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Weaknesses