{"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": "2026-08-28T15:14:26.918Z"}, "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)"}]}}}

{}

{"affected": [{"affectedData": [{"collectionURL": "https://pkg.go.dev", "defaultStatus": "unaffected", "packageName": "golang.org/x/crypto/ssh", "product": "golang.org/x/crypto/ssh", "programRoutines": [{"name": "connection.serverAuthenticate"}, {"name": "NewServerConn"}], "vendor": "golang.org/x/crypto", "versions": [{"lessThan": "0.55.0", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@golang.org"}], "cveTags": [], "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."}], "id": "CVE-2026-56854", "lastModified": "2026-08-28T16:18:17.607", "metrics": {}, "published": "2026-08-28T16:18:17.607", "references": [{"source": "security@golang.org", "url": "https://go.dev/cl/797040"}, {"source": "security@golang.org", "url": "https://go.dev/issue/80213"}, {"source": "security@golang.org", "url": "https://pkg.go.dev/vuln/GO-2026-6303"}], "sourceIdentifier": "security@golang.org", "vulnStatus": "Received"}

{}

{"created": "2026-08-28T16:45:03.940221+00:00", "updated": "2026-08-28T16:45:03.940246+00:00", "vendors": [], "weaknesses": ["CWE-285"]}