CVE WatchJul 21, 2026

CVE-2026-39828

When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded,

CVSS

6.3

Medium

EPSS

0.3%

p24

KEV

—

Exploit Today

0-100

Published: May 22, 2026 · Last modified: Jul 21, 2026 · CWE-295 · CWE-281

EPSS · 30d

0.2%EPSS · 30 days0.3%

2026-06-302026-07-21

Technical description

When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certificate restrictions such as force-command after a second factor succeeded. Returning non-nil Permissions with PartialSuccessError now results in a connection error.

Official references

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