CVE-2026-96399
High
Description
A repository's external issue tracker regular expression containing alternating capture groups could produce invalid slice indexes when Gitea rendered issue references, causing a runtime panic that terminated the Gitea process. A user who can edit a repository's external issue tracker settings could make any later rendering of matching content, such as viewing a README, crash the instance for all users.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Gitea
PublishedOct 6, 2026
First seenOct 6, 2026
Weakness typeCWE-125Out-of-bounds readCWE-248CWE-248
How to fix
Update
- gitea gitea28.0.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gitea gitea | v < 28.0.0 | 28.0.0 |
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