CVE-2026-39835

high

Description

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.

References

https://pkg.go.dev/vuln/GO-2026-5015

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

https://go.dev/issue/79563

https://go.dev/cl/781660

Details

Source: Mitre, NVD

Published: 2026-05-22

Updated: 2026-05-22

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High