Gitea up to 28.0.0 Media {filepath} cross site scripting

Summaryinfo

A vulnerability was found in Gitea up to 28.0.0. It has been classified as problematic. Affected by this issue is some unknown functionality of the file /api/v1/repos/{owner}/{repo}/media/{filepath} of the component Media. This manipulation causes cross site scripting. This vulnerability is handled as CVE-2026-96594. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic was found in Gitea up to 28.0.0. Affected by this vulnerability is an unknown code block of the file /api/v1/repos/{owner}/{repo}/media/{filepath} of the component Media. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

The Gitea API endpoint `GET /api/v1/repos/{owner}/{repo}/media/{filepath}` wrote files of up to 1 KiB that are stored directly in Git, not in LFS, to the response without the content type and disposition headers Gitea uses for user content. An HTML file committed to a repository was therefore rendered by the browser on the Gitea origin. A user who can push to a repository could run JavaScript in the session of a victim who opens the media URL and act with the victim's permissions.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-96594 since 10/05/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

• Gitea

Version

• 28.0

License

• open-source

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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