CVE-2026-42508
Invoking auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts
CVSS Score
9.1
EPSS Score
0.5%
EPSS Percentile
39th
Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation. Now, both the 'key' and 'key.SignatureKey' are checked for @revoked.
| Vendor | golang.org/x/crypto |
| Product | golang.org/x/crypto/ssh/knownhosts |
| Published | May 22, 2026 |
| Last Updated | Jul 23, 2026 |
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Affected Versions
golang.org/x/crypto / golang.org/x/crypto/ssh/knownhosts
0 < 0.52.0
References
go.dev: https://go.dev/issue/79568 go.dev: https://go.dev/cl/781220 groups.google.com: https://groups.google.com/g/golang-announce/c/a082jnz-LvI pkg.go.dev: https://pkg.go.dev/vuln/GO-2026-5021 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-42508 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2480688 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42508.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:41019 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:36796 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:37072 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:35833 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:37123 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:36808 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:43692 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:41064 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:26546 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:26547 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:36651 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:40945 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:40118 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:23262 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:23264 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:36648 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:41036 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:37387 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:42146 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:43052 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:42796 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:41066 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:41031 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:40262 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:36797