CVE-2025-58186 - CVE House

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Status published Unknown CVE-2025-58186

Lack of limit when parsing cookies can cause memory exhaustion in net/http

0 CVSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

jub0bs

References

More from Go standard library

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Unexpected session resumption in crypto/tls

Handshake messages may be processed at the incorrect encryption level in crypto/tls

Excessive resource consumption when printing error string for host certificate validation in crypto/x509

Excessive CPU consumption when building archive index in archive/zip

Improper application of excluded DNS name constraints when verifying wildcard names in crypto/x509

Affected Vendor

Go standard library

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Affected Software

net/http

Vulnerable Versions:

0, 1.25.0

Timeline

Official Publish: October 29th, 2025

Last Modified: November 4th, 2025

Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.