Gitea denial of service through external issue tracker patterns
Summary
| CVE | CVE-2026-96399 |
|---|---|
| State | PUBLISHED |
| Assigner | Gitea |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-06 20:17:35 UTC |
| Updated | 2026-10-06 20:17:35 UTC |
| 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. |
Risk And Classification
Problem Types: CWE-125 | CWE-248 | CWE-125 CWE-125: Out-of-bounds Read | CWE-248 CWE-248: Uncaught Exception
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/go-gitea/gitea/releases/tag/v28.0.0 | 88ee5874-cf24-4952-aea0-31affedb7ff2 | github.com | |
| blog.gitea.com/release-of-28.0.0 | 88ee5874-cf24-4952-aea0-31affedb7ff2 | blog.gitea.com | |
| github.com/go-gitea/gitea/pull/39354 | 88ee5874-cf24-4952-aea0-31affedb7ff2 | github.com | |
| github.com/go-gitea/gitea/security/advisories/GHSA-mw6q-qj47-9g5q | 88ee5874-cf24-4952-aea0-31affedb7ff2 | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: https://github.com/davue (en)
CNA: https://github.com/breken-ai (en)
CNA: https://github.com/wxiaoguang (en)
There are currently no legacy QID mappings associated with this CVE.