High 7.5Published Oct 6, 2026

CVE-2026-96399Gitea denial of service through external issue tracker patterns

Updated under an hour ago (2026-10-19 10:00 UTC)

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It affects Gitea. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.35%, higher than 27% of scored CVEs.

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Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-125, CWE-248
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.35% (percentile 27)
Assigned by: Gitea
NVD analysis: Analyzed
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Gitea Gitea gitea:gitea (from the name)	through 1.27.3	CNA record
gitea gitea gitea:gitea	before 28.0.0	NVD

References

https://github.com/go-gitea/gitea/security/advisories/GHSA-mw6q-qj47-9g5qvendor-advisory
https://github.com/go-gitea/gitea/pull/39354patch
https://blog.gitea.com/release-of-28.0.0/release-notes
https://github.com/go-gitea/gitea/releases/tag/v28.0.0release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.