PT-2026-42714 · Unknown · Certchecker

Published 2026-05-22 · Updated 2026-05-22 · CVE-2026-39835

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions SSH servers (affected versions not specified)

Description SSH servers using CertChecker as a public key callback may experience a panic when a client presents a certificate if IsUserAuthority or IsHostAuthority are not set. A panic is a critical error that causes a program to crash unexpectedly.

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

Related Identifiers

CVE-2026-39835

GO-2026-5015

Affected Products

Certchecker

References · 6

• https://osv.dev/vulnerability/GO-2026-5015 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-39835 · Security Note
• https://go.dev/issue/79563 · Note
• https://groups.google.com/g/golang-announce/c/a082jnz-LvI · Note
• https://pkg.go.dev/vuln/GO-2026-5015 · Note
• https://go.dev/cl/781660 · Note