CVE-2026-42508

CRITICAL

Invoking auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts

Title source: cna
STIX 2.1

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.

References (36)

Core 36
Core References

Scores

CVSS v3 9.1
EPSS 0.0057
EPSS Percentile 43.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-295
Status published
Products (3)
golang/crypto < 0.52.0
golang.org/x/crypto/golang.org/x/crypto/ssh/knownhosts < 0.52.0
x/crypto 0 - 0.52.0Go
Published May 22, 2026
Tracked Since May 22, 2026