CVE-2025-58186

Description

Despite HTTP headers having a default limit of 1MB, the number of cookies that can be parsed does not have a limit. By sending a lot of very small cookies such as "a=;", an attacker can make an HTTP server allocate a large amount of structs, causing large memory consumption.

References

https://pkg.go.dev/vuln/GO-2025-4012

https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bI

https://go.dev/issue/75672

https://go.dev/cl/709855

https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-36733

http://www.openwall.com/lists/oss-security/2025/10/08/1

Details

Source: Mitre, NVD

Named Vulnerability: GO-2025-4012Named Vulnerability: GHSA-rjcg-56ph-3qvg

Risk Information

CVSS v2

CVSS v3

EPSS