What’s Vulnerable › Vulnerabilities

CVE-2026-58421: Unauthenticated ReDoS via CODEOWNERS pattern matching allows denial of service

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-03 · updated 2026-10-25
• Weakness: CWE-284

Description

Unauthenticated ReDoS via CODEOWNERS pattern matching allows denial of service

Affected products

• Gitea Open Source Git Server: before 1.26.2 — fixed in 1.26.2

How to fix

Upgrade to a fixed version: Gitea Open Source Git Server 1.26.2. Check the vendor advisory for mitigations.

References

• https://blog.gitea.com/release-of-1.26.3-and-1.26.4/
• https://github.com/go-gitea/gitea/pull/38011
• https://github.com/go-gitea/gitea/releases/tag/v1.26.4
• https://github.com/go-gitea/gitea/security/advisories/GHSA-v96j-25gv-g2w9
• https://github.com/go-gitea/gitea/security/advisories/GHSA-v96j-25gv-g2w9

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