CVE-2026-96399CWE-125CWE-248

CVE-2026-96399

High · published October 7, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
27.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00350 · 27.4th percentile
Weaknesses
CWE-125 · Out-of-bounds Read; CWE-248 · Uncaught Exception
Published
2026-10-07T00:17Z
Affected products (1)
ProductVersionsFixed in
gitea/gitea< 28.0.028.0.0
References (4)
https://blog.gitea.com/release-of-28.0.0/ · 88ee5874-cf24-4952-aea0-31affedb7ff2https://github.com/go-gitea/gitea/pull/39354 · 88ee5874-cf24-4952-aea0-31affedb7ff2https://github.com/go-gitea/gitea/releases/tag/v28.0.0 · 88ee5874-cf24-4952-aea0-31affedb7ff2https://github.com/go-gitea/gitea/security/advisories/GHSA-mw6q-qj47-9g5q · 88ee5874-cf24-4952-aea0-31affedb7ff2
EPSS history
Timeline
  • 08 OCT 03:33Z
    EPSS moved — → 0%
    epss
  • 06 OCT 19:25Z
    Gitea denial of service through external issue tracker patterns
    cvelistv5