CVE-2026-39835

Aliases:GO-2026-5015GHSA-78mq-xcr3-xm33
Advisory lineage Upstream: 0 Downstream: 51
Analyzed
Published: 22 May 2026, 02:31
Last modified:22 Jul 2026, 12:08

Vulnerability Summary

Overall Risk (default)
low
21/100
CVSS Score
5.3 MEDIUM
v3.1 (cve.org)
EPSS Score
0.37% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

22 May 2026, 02:31
Published
Vulnerability first disclosed
22 Jul 2026, 12:08
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS Trends

Current EPSS score: 0.37%• Percentile: 29%

Techniques & Countermeasures

  • CWE-295•Improper Certificate Validation

    The product does not validate, or incorrectly validates, a certificate.

  • CWE-476•NULL Pointer Dereference

    The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

  • golang•crypto

    < 0.52.0

  • golang.org/x•crypto

    < 0.52.0

  • golang.org/x/crypto•ssh

    < 0.52.0

  • golang.org/x/crypto•golang.org/x/crypto/ssh

    < 0.52.0

References (41)