High severity · published Aug 13, 2026
CVE-2026-58436
ParseAcceptLanguage quadratic-time DoS via Locale middleware on unauthenticated requests
7.5
CVSS
0.6%
EPSS
No
On KEV
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GO
Gitea Open Source Git Server · Gitea
through 1.26.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-58436
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-58436
blog.gitea.com
https://blog.gitea.com/gitea-1.27.0-is-released/
github.com
https://github.com/go-gitea/gitea/releases/tag/v1.27.0
github.com
https://github.com/go-gitea/gitea/security/advisories/GHSA-fw57-jgch-pgf3
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