{"id":"CVE-2026-65635","summary":"Boruta dynamic client registration allows creation of over-privileged OAuth clients","details":"Improper Isolation or Compartmentalization vulnerability in malach-it boruta (Elixir.Boruta.Openid module) allows attackers to register OpenID Connect clients with administrative privileges through the dynamic client registration entry point. Boruta.Openid.register_client/3 forwards caller-supplied registration parameters to the administrative client creation path without a public/admin field-level allowlist, so an unauthenticated registrant can set security-sensitive attributes including supported grant types, authorized scopes, PKCE enforcement, public refresh and revocation behavior, token lifetimes, and signing settings. The library does not distinguish between metadata a public registrant is allowed to set and administrative controls that should require operator approval.\n\nThis vulnerability is associated with program files lib/boruta/openid.ex and program routines 'Elixir.Boruta.Openid':register_client/3, 'Elixir.Boruta.Openid':parse_registration_params/2.\n\nThis issue affects boruta from 2.3.0 before 2.3.7.","aliases":["EEF-CVE-2026-65635","GHSA-w869-fcf2-68vp"],"modified":"2026-08-04T11:51:17.986340841Z","published":"2026-07-30T14:17:02.942Z","database_specific":{"cwe_ids":["CWE-653"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65635.json","unresolved_ranges":[{"extracted_events":[{"introduced":"85481b706636fe68a43d0b8d3275e2afc7f7fee1"},{"fixed":"*"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"EEF"},"references":[{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-65635.html"},{"type":"WEB","url":"https://github.com"},{"type":"WEB","url":"https://osv.dev/vulnerability/EEF-CVE-2026-65635"},{"type":"WEB","url":"https://repo.hex.pm"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65635.json"},{"type":"ADVISORY","url":"https://github.com/malach-it/boruta_auth/security/advisories/GHSA-w869-fcf2-68vp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65635"},{"type":"FIX","url":"https://github.com/malach-it/boruta_auth/commit/82584c854a332482232fd25301ab12a835f9f643"},{"type":"FIX","url":"https://github.com/malach-it/boruta_auth/commit/95619a1beaff68fa766cca9b388e7c780d182525"},{"type":"PACKAGE","url":"https://github.com/malach-it/boruta_auth"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/malach-it/boruta_auth","events":[{"introduced":"0"},{"fixed":"fa474710cfc57abf0ab1374c615cc66df1a05239"}],"database_specific":{"extracted_events":[{"introduced":"2.3.0"},{"fixed":"2.3.7"}],"source":"AFFECTED_FIELD"}}],"versions":["2.3.6","2.3.5","2.3.4","2.3.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-65635.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:L/SC:L/SI:L/SA:N"}]}