CVE-2025-61730 Affecting cosign package, versions <3.0.4-r2


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.01% (1st percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-COSIGN-15235996
  • published6 Feb 2026
  • disclosed28 Jan 2026

Introduced: 28 Jan 2026

CVE-2025-61730  (opens in a new tab)

How to fix?

Upgrade Chainguard cosign to version 3.0.4-r2 or higher.

NVD Description

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

During the TLS 1.3 handshake if multiple messages are sent in records that span encryption level boundaries (for instance the Client Hello and Encrypted Extensions messages), the subsequent messages may be processed before the encryption level changes. This can cause some minor information disclosure if a network-local attacker can inject messages during the handshake.

CVSS Base Scores

version 3.1