CVE-2025-58186
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.
- Published Oct 29, 2025
- CVSS 5.3 medium
- 0.6% chance of exploitation in the next 30 days (EPSS)