| id: GO-2026-5015 |
| modules: |
| - module: golang.org/x/crypto |
| versions: |
| - fixed: 0.52.0 |
| vulnerable_at: 0.51.0 |
| packages: |
| - package: golang.org/x/crypto/ssh |
| symbols: |
| - CertChecker.CheckHostKey |
| - CertChecker.Authenticate |
| summary: Invoking server panic during CheckHostKey/Authenticate in golang.org/x/crypto/ssh |
| 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. |
| credits: |
| - NCC Group Cryptography Services, sponsored by Teleport |
| references: |
| - report: https://go.dev/issue/79563 |
| - web: https://groups.google.com/g/golang-announce/c/a082jnz-LvI |
| - fix: https://go.dev/cl/781660 |
| cve_metadata: |
| id: CVE-2026-39835 |
| cwe: 'CWE-476: NULL Pointer Dereference' |
| source: |
| id: go-security-team |
| review_status: REVIEWED |
