CVE-2026-39828: golang.org/x/crypto/ssh vulnerable to invoking bypass of certificate restrictions
(updated )
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.
References
- access.redhat.com/errata/RHSA-2026:26546
- access.redhat.com/errata/RHSA-2026:26547
- access.redhat.com/errata/RHSA-2026:36167
- access.redhat.com/security/cve/CVE-2026-39828
- bugzilla.redhat.com/show_bug.cgi?id=2480687
- github.com/advisories/GHSA-45gg-vh54-h5m9
- go.dev/cl/781621
- go.dev/issue/79562
- groups.google.com/g/golang-announce/c/a082jnz-LvI
- nvd.nist.gov/vuln/detail/CVE-2026-39828
- pkg.go.dev/vuln/GO-2026-5014
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39828.json
Code Behaviors & Features
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