PT-2026-42715 · Go+1 · Golang.Org/X/Crypto+1

Published 2026-05-22 · Updated 2026-05-22 · CVE-2026-42508

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions The product name cannot be determined (affected versions not specified)

Description A failure occurred where a revoked SignatureKey belonging to a Certificate Authority (CA) was not correctly checked for revocation. The issue involves the validation process for the key and key.SignatureKey variables regarding their @revoked status.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2026-42508

GO-2026-5021

Affected Products

Golang.Org/X/Crypto

Golang.Org/X/Crypto/Ssh/Knownhosts

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-42508 · Security Note
• https://osv.dev/vulnerability/GO-2026-5021 · Vendor Advisory
• https://groups.google.com/g/golang-announce/c/a082jnz-LvI · Note
• https://pkg.go.dev/vuln/GO-2026-5021 · Note
• https://go.dev/issue/79568 · Note
• https://go.dev/cl/781220 · Note