CVE-2025-58189 Affecting mattmoor-chainit package, versions <0.0.9-r26


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.03% (8th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-MATTMOORCHAINIT-13842004
  • published6 Nov 2025
  • disclosed29 Oct 2025

Introduced: 29 Oct 2025

NewCVE-2025-58189  (opens in a new tab)

How to fix?

Upgrade Chainguard mattmoor-chainit to version 0.0.9-r26 or higher.

NVD Description

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

When Conn.Handshake fails during ALPN negotiation the error contains attacker controlled information (the ALPN protocols sent by the client) which is not escaped.

CVSS Base Scores

version 3.1