CVE-2026-42508

9.1 CRITICAL

Published: May 22, 2026 Modified: May 28, 2026

Description

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://go.dev/cl/781220

Source: security@golang.org

Issue Tracking

https://go.dev/issue/79568

Source: security@golang.org

Issue Tracking

https://groups.google.com/g/golang-announce/c/a082jnz-LvI

Source: security@golang.org

Mailing List

https://pkg.go.dev/vuln/GO-2026-5021

Source: security@golang.org

Vendor Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score

9.1 / 10.0

EPSS (Exploit Probability)

0.0%

12th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-295

Affected Vendors

golang

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