Denial of Service Vulnerability in Gitea by Go-Gitea
CVE-2026-96399

7.5HIGH

Key Information:

Vendor

Gitea

Status
Gitea
Vendor
CVE Published:
6 October 2026

What is CVE-2026-96399?

A vulnerability exists in Gitea that can be exploited when an external issue tracker is misconfigured. Due to a flaw in the regular expression handling of this tracker, users who possess edit permissions can lead to invalid slice indexes during the rendering of issue references. This can result in a runtime panic that crashes the Gitea instance for all users. Consequently, any attempt to view related content, like a README, can become problematic and disrupt the service entirely.

Affected Version(s)

Gitea 0 <= 1.27.3

References

https://github.com/go-gitea/gitea/security/advisories/GHS...
vendor-advisory
https://github.com/go-gitea/gitea/pull/39354
patch
https://blog.gitea.com/release-of-28.0.0/
release-notes

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

https://github.com/davue
https://github.com/breken-ai
https://github.com/wxiaoguang
.