Gitea up to 28.2.x Issue Timeline API information disclosure

Summaryinfo

A vulnerability classified as problematic has been found in Gitea up to 28.2.x. The impacted element is an unknown function of the component Issue Timeline API. Performing a manipulation results in information disclosure. This vulnerability is known as CVE-2026-117649. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Gitea up to 28.2.x. This affects some unknown processing of the component Issue Timeline API. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

The issue timeline API and the web issue page hid cross-reference events that point at issues the reader cannot access, but not "dependency added" and "dependency removed" events. When a readable issue had been linked as a dependency to an issue in a repository the reader cannot access, for example a private repository, any reader of the first issue, including anonymous users of a public repository, received the linked issue's current title, body, state, labels, poster and attachment names through the API, and its repository, number and title on the web page. Creating the link requires access to both issues; comments and attachment downloads of the linked issue stayed protected. Dependency events are now filtered with the same read permission check; a related exposure of unlinked attachment metadata through hidden dependency placeholders was already fixed in 28.2.0.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-117649 since 11/01/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

Upgrading to version 28.3.0 eliminates this vulnerability.

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Productinfo

Name

• Gitea

Version

• 28.0
• 28.1
• 28.2

License

• open-source

CPE 2.3info

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CPE 2.2info

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Entryinfo

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