CVE-2025-58186

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CVSS 3.1

5.3 medium

EPSS

<1%p43

Published

Oct 29, 2025 (Oct 29, 2025)

Modified

Jun 17, 2026

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.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

NVD CVE.org GitHub PoCs EPSS (0.5%)

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