Improper Certificate Validation Affecting golang-go.crypto package, versions <1:0.0~git20211202.5770296-1ubuntu0.1~esm2


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.57% (44th percentile)

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  • Snyk IDSNYK-UBUNTU2204-GOLANGGOCRYPTO-16800718
  • published10 Jun 2026
  • disclosed22 May 2026

Introduced: 22 May 2026

CVE-2026-42508  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

Upgrade Ubuntu:22.04 golang-go.crypto to version 1:0.0git20211202.5770296-1ubuntu0.1esm2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream golang-go.crypto package and not the golang-go.crypto package as distributed by Ubuntu. See How to fix? for Ubuntu:22.04 relevant fixed versions and status.

Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation. Now, both the 'key' and 'key.SignatureKey' are checked for @revoked.

References

CVSS Base Scores

version 3.1