cve.bz

CVE-2026-39835

5.3 mediumEPSS 0.5%

Medium (5.3) in golang crypto. EPSS 0.5% chance of exploitation in the next 30 days. Fixed in golang.org/x/crypto 0.52.0.

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.

Severity

CVSS 3.1

5.3 medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS
0.5% chance of exploitation in the next 30 days; higher than 43% of CVEs (scores of 2026-10-31)
CWEs
CWE-295, CWE-476
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-78mq-xcr3-xm33Gogolang.org/x/crypto<0.52.00.52.0
GO-2026-5015Gogolang.org/x/crypto<0.52.00.52.0

References

Check your stackJSON