CVE-2025-58186
Lack of limit when parsing cookies can cause memory exhaustion in net/http
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 5.3EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
29 Oct 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products
Go standard library · net/httpWant to know if your infrastructure is exposed to this?
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