{"schema_version":"1.9.0","id":"GHSA-78mq-xcr3-xm33","published":"2026-06-25T22:15:17Z","modified":"2026-09-02T15:45:32.574833436Z","aliases":["CVE-2026-39835","GO-2026-5015"],"related":["CGA-p8m7-4pf5-w9v8"],"summary":"golang.org/x/crypto is vulnerable to invoking server panic during CheckHostKey/Authenticate flow","details":"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.","affected":[{"package":{"name":"golang.org/x/crypto","ecosystem":"Go","purl":"pkg:golang/golang.org/x/crypto"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.52.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-78mq-xcr3-xm33/GHSA-78mq-xcr3-xm33.json"}}],"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39835"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:41066"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:42146"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:42796"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:43052"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:43692"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:46885"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:47735"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:47949"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:48151"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:51033"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:51036"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:51038"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:52857"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:52910"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:54525"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:57194"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:59467"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:59593"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:60520"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:62260"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-39835"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2480680"},{"type":"PACKAGE","url":"https://cs.opensource.google/go/x/crypto"},{"type":"WEB","url":"https://go.dev/cl/781660"},{"type":"WEB","url":"https://go.dev/issue/79563"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/a082jnz-LvI"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2026-5015"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39835.json"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:26546"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:26547"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:36199"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:36207"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:36319"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:36625"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:36648"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:36651"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:36796"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:36797"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:37072"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:37123"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:37268"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:37271"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:37272"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:37286"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:37296"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:37387"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:37410"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:38504"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:40118"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:40262"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:40945"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:40969"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:40972"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:40974"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:41019"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:41031"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:41036"}],"database_specific":{"cwe_ids":["CWE-295","CWE-476"],"github_reviewed":true,"github_reviewed_at":"2026-06-25T22:15:17Z","nvd_published_at":"2026-05-22T04:16:24Z","severity":"MODERATE"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}