CVE-2026-42505 Affecting go-openssl-1.25 package, versions <1.25.12-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.38% (30th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-CHAINGUARDLATEST-GOOPENSSL125-17918547
  • published10 Jul 2026
  • disclosed8 Jul 2026

Introduced: 8 Jul 2026

CVE-2026-42505  (opens in a new tab)

How to fix?

Upgrade Chainguard go-openssl-1.25 to version 1.25.12-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream go-openssl-1.25 package and not the go-openssl-1.25 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

Handshakes which used Encrypted Client Hello could be de-anonymized by a passive network observer due to a disclosure of pre-shared key identities in the unencrypted client hello.

CVSS Base Scores

version 3.1