Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Golang | Crypto | < 0.52.0 |
Related Weaknesses (CWE)
References
- https://go.dev/cl/781660Issue Tracking
- https://go.dev/issue/79563Issue Tracking
- https://groups.google.com/g/golang-announce/c/a082jnz-LvIMailing List
- https://pkg.go.dev/vuln/GO-2026-5015Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:26546
- https://access.redhat.com/errata/RHSA-2026:26547
- https://access.redhat.com/errata/RHSA-2026:36199
- https://access.redhat.com/errata/RHSA-2026:36207
- https://access.redhat.com/errata/RHSA-2026:36319
- https://access.redhat.com/errata/RHSA-2026:36625
- https://access.redhat.com/errata/RHSA-2026:36648
- https://access.redhat.com/errata/RHSA-2026:36651
- https://access.redhat.com/errata/RHSA-2026:36796
- https://access.redhat.com/errata/RHSA-2026:36797
- https://access.redhat.com/errata/RHSA-2026:37072
FAQ
What is CVE-2026-39835?
CVE-2026-39835 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 ...
How severe is CVE-2026-39835?
CVE-2026-39835 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-39835?
Check the references section above for vendor advisories and patch information. Affected products include: Golang Crypto.