Vulnerability · Published Aug 13, 2026 · Assigned by Gitea
CVE-2026-58436ParseAcceptLanguage quadratic-time DoS via Locale middleware on unauthenticated requests
High 7.5
In plain English
A high-severity regular-expression denial of service in Gitea Open Source Git Server from Gitea. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.6%top 50.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
ParseAcceptLanguage quadratic-time DoS via Locale middleware on unauthenticated requests
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | code.gitea.io/gitea | 1.27.0 | GHSA-fw57-jgch-pgf3 |
| Go | gitea.dev | 1.27.0 | GO-2026-6055 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Gitea | Gitea Open Source Git Server | 0 – through 1.26.4 |
Weakness: CWE-407, CWE-1333 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- GitHub Security Advisory vendor-advisory
- Gitea v1.27.0 Release release-notes
- Gitea v1.27.0 Release Blog Post release-notes