CVE-2025-58186 Affecting ip-masq-agent package, versions <2.12.0-r14


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.03% (7th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-IPMASQAGENT-13831490
  • published4 Nov 2025
  • disclosed29 Oct 2025

Introduced: 29 Oct 2025

CVE-2025-58186  (opens in a new tab)

How to fix?

Upgrade Chainguard ip-masq-agent to version 2.12.0-r14 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ip-masq-agent package and not the ip-masq-agent package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

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 Base Scores

version 3.1