{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-56854","assignerOrgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","state":"PUBLISHED","assignerShortName":"Go","dateReserved":"2026-06-23T15:10:49.353Z","datePublished":"2026-08-28T15:14:26.918Z","dateUpdated":"2026-08-28T20:17:17.397Z"},"containers":{"cna":{"providerMetadata":{"orgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","shortName":"Go","dateUpdated":"2026-08-28T15:14:26.918Z"},"title":"Source-address critical option not enforced for non-public-key auth callbacks in golang.org/x/crypto/ssh","descriptions":[{"lang":"en","value":"The source-address critical option in the Permissions returned by an authentication callback was only enforced for the PublicKeyCallback and VerifiedPublicKeyCallback paths, extending the fix for CVE-2026-46595. Permissions returned by the PasswordCallback, KeyboardInteractiveCallback, NoClientAuthCallback, and GSSAPIWithMICConfig.AllowLogin callbacks were not validated against the client's remote address, so a source-address restriction set by those callbacks was silently ignored. The check is now applied to the Permissions returned by any authentication callback."}],"affected":[{"vendor":"golang.org/x/crypto","product":"golang.org/x/crypto/ssh","collectionURL":"https://pkg.go.dev","packageName":"golang.org/x/crypto/ssh","versions":[{"version":"0","lessThan":"0.55.0","status":"affected","versionType":"semver"}],"programRoutines":[{"name":"connection.serverAuthenticate"},{"name":"NewServerConn"}],"defaultStatus":"unaffected"}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-863: Incorrect Authorization"}]}],"references":[{"url":"https://go.dev/issue/80213"},{"url":"https://go.dev/cl/797040"},{"url":"https://pkg.go.dev/vuln/GO-2026-6303"}],"credits":[{"lang":"en","value":"Longwei Wang (@gn00295120)"}]},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-863","lang":"en","description":"CWE-863 Incorrect Authorization"}]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-08-28T20:16:07.248758Z","id":"CVE-2026-56854","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-28T20:17:17.397Z"}}]}}