CVE-2026-113429
Dashboard / Vulnerabilities / CVE-2026-113429
Summary: Gitea stored XSS through legacy Actions artifact Content-Encoding
Details: 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.
References: https://blog.gitea.com/release-of-28.3.0/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/113xxx/CVE-2026-113429.json, https://github.com/go-gitea/gitea/releases/tag/v28.3.0, https://github.com/go-gitea/gitea/security/advisories/GHSA-9v6p-xpcp-7488, https://nvd.nist.gov/vuln/detail/CVE-2026-113429, https://github.com/go-gitea/gitea/pull/39855, https://github.com/go-gitea/gitea/pull/39996
Affected packages
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