CVE-2026-107686: Gitea reactions accepted on locked issues and comments

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-18 · updated 2026-10-29
Weakness: CWE-284

Description

The Gitea web handlers for adding and removing reactions on issues and comments did not refuse locked issues for users without write access, although the API did. A signed-in user who could read an issue could therefore add or remove reactions on a locked issue and its comments, bypassing the interaction restriction of the lock. Only reactions were affected; no content could be changed.

Affected products

Gitea Open Source Git Server: through 28.1.0

References

https://blog.gitea.com/release-of-28.2.0/
https://github.com/go-gitea/gitea/pull/39839
https://github.com/go-gitea/gitea/pull/39847
https://github.com/go-gitea/gitea/releases/tag/v28.2.0
https://github.com/go-gitea/gitea/security/advisories/GHSA-wx44-9m3m-rjqx

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