{"id":"CVE-2026-42508","aliases":["GHSA-5cgq-3rg8-m6cv","GO-2026-5021"],"url":"https://o3.security/vulnerability/CVE-2026-42508","summary":"Invoking  auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts","details":"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.","published":"2026-05-22T02:31:27.644Z","modified":"2026-09-08T03:46:42.354641532Z","cvss":{"score":9.1,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},"epss":{"score":0.07314,"percentile":0.93964,"asOf":"2026-09-07"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"golang.org/x/crypto","fixedVersion":"0.52.0"}],"fix":null,"references":[{"type":"WEB","url":"https://go.dev/cl/781220"},{"type":"WEB","url":"https://go.dev/issue/79568"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/a082jnz-LvI"},{"type":"WEB","url":"https://pkg.go.dev"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2026-5021"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42508.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:23262"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:23264"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:26546"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:26547"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:35833"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36648"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36651"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36796"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36797"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36808"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:37072"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:37123"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:37387"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40118"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40262"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40945"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:41019"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:41031"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:41036"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:41064"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:41066"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:42146"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:42796"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:43052"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:43692"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:46885"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:47735"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:47737"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:49944"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:51033"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:51288"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:52857"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:52910"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:54400"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:57194"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:59467"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:60520"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:61314"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-42508"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42508.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42508"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2480688"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-08T03:46:42.354641532Z"}}