CVE-2026-103667
Gitea container registry stored XSS through blob media type
- State
- Published
- Severity
- 5.4 Medium
- Published
- Oct 6, 2026
- Updated
- Oct 7, 2026
- Reserved
- Oct 4, 2026
Description
Gitea's container registry served blob downloads with a `Content-Type` taken from the media type declared in pushed image manifests, without a `Content-Disposition` or restrictive content security policy. A user who can push container images can publish a blob containing HTML and JavaScript with a `text/html` media type. When a victim who is authenticated to the instance opens the blob URL in a browser, the script runs on the Gitea origin and can perform actions as the victim, such as creating API tokens.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N | CISA-ADP |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
GiteaGitea |
|
References
- GitHub Security Advisory GHSA-7cq7-4v93-8wjmvendor-advisory
- Fix: go-gitea/gitea pull request #39398patch
- Gitea 28.0.0 release announcementrelease-notes
- go-gitea/gitea v28.0.0 releaserelease-notes
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