CVE-2025-58186
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-29

Last updated on: 2025-11-04

Assigner: Go Project

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.
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Meta Information
Published
2025-10-29
Last Modified
2025-11-04
Generated
2026-06-16
AI Q&A
2025-10-30
EPSS Evaluated
2026-06-14
NVD
CVE-2025-58186
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
golang go From 1.25.0 (inc) to 1.25.2 (inc)
golang go 1.25.2
golang go 1.24.8
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability occurs because while HTTP headers have a default size limit of 1MB, there is no limit on the number of cookies that can be parsed. An attacker can exploit this by sending many very small cookies (e.g., "a=;"), causing the HTTP server to allocate a large number of data structures, which leads to excessive memory consumption.

Impact Analysis

The vulnerability can cause an HTTP server to consume a large amount of memory, potentially leading to degraded performance, denial of service, or server crashes due to resource exhaustion.

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