CVE-2026-39835mediumCWE-476

Invoking server panic during CheckHostKey/Authenticate in golang.org/x/crypto/ssh

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 5.3epss 0.5%

exploitation probability

0.5%top 59% of all CVEs

observed exploitation

nono source reports it

SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChecker now returns an error instead of panicking when these callbacks are nil.

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

Affected products

golang.org/x/crypto · golang.org/x/crypto/ssh

References