CVE-2025-58186

CVE-2025-58186

Medium · published October 30, 2025

CVSS v3.1
5.3
EPSS
1%
Percentile
46.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00565 · 46.1th percentile
Published
2025-10-30T03:16Z
References (5)
https://go.dev/cl/709855 · [email protected]https://go.dev/issue/75672 · [email protected]https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bI · [email protected]https://pkg.go.dev/vuln/GO-2025-4012 · [email protected]http://www.openwall.com/lists/oss-security/2025/10/08/1 · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 29 OCT 22:10Z
    Lack of limit when parsing cookies can cause memory exhaustion in net/http
    cvelistv5