{"id":"CVE-2026-92288","revision":null,"records":[{"revision":"677083eea7fa451ebf5474f49d008c8c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-92288","aliases":[],"title":"Lemonldap::NG::Portal versions from 2.20.0 before 2.21.6, from 2.22.0 before 2.23.4 for Perl allow unauthenticated OAuth2 token introspection because checkEndPointAuthenticationCredentials does not verify the client secret of a public Relying Party","description":"Lemonldap::NG::Portal versions from 2.20.0 before 2.21.6, from 2.22.0 before 2.23.4 for Perl allow unauthenticated OAuth2 token introspection because checkEndPointAuthenticationCredentials does not verify the client secret of a public Relying Party.\n\ncheckEndPointAuthenticationCredentials() skips the secret comparison for a Relying Party marked public and still returns the authentication method deduced from the request, client_secret_basic or client_secret_post. introspection() rejects a caller only when that method is missing or none, so a request carrying a public client_id and an arbitrary or empty secret passes the endpoint's authentication check.\n\nAn attacker who holds an access token and knows the client_id of any public Relying Party can confirm the token is active and read its metadata, including scope, audience, expiry and the sub claim. The sub claim is computed with the calling Relying Party's user identifier attribute, so an attacker can translate a user identifier from one Relying Party to another, defeating per-client and pseudonymous identifiers.","state":0,"publishedAt":"2026-09-25T00:10:24.5+00:00","modifiedAt":"2026-09-25T15:47:49.593+00:00","affected":[{"ecosystem":"https://cpan.org/modules","name":"Lemonldap-NG-Portal","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"collectionURL\": \"https://cpan.org/modules\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"modules\": [\n                        \"Lemonldap::NG::Portal\"\n                    ],\n                    \"packageName\": \"Lemonldap-NG-Portal\",\n                    \"packageURL\": \"pkg:cpan/Lemonldap-NG-Portal\",\n                    \"programFiles\": [\n                        \"lib/Lemonldap/NG/Portal/Lib/OpenIDConnect.pm\",\n                        \"lib/Lemonldap/NG/Portal/Issuer/OpenIDConnect.pm\"\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"Lemonldap::NG::Portal::Lib::OpenIDConnect::checkEndPointAuthenticationCredentials\"\n                        },\n                        {\n                            \"name\": \"Lemonldap::NG::Portal::Issuer::OpenIDConnect::introspection\"\n                        }\n                    ],\n                    \"repo\": \"https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"2.21.6\",\n                            \"status\": \"affected\",\n                            \"version\": \"2.20.0\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"lessThan\": \"2.23.4\",\n                            \"status\": \"affected\",\n                            \"version\": \"2.22.0\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/3719","https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/3721","https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.23.4","https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.21.6"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-92288","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-92288","identifiers":["CVE-2026-92288"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-9db698e4659747149ec1092e3d34a5a1","complete":true,"records":13764,"lastAttemptAt":"2026-11-12T10:56:11.9015763+00:00","lastSuccessAt":"2026-11-12T09:56:01.656+00:00","error":null,"lastVerifiedAt":"2026-11-12T09:56:01.656+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13817,"expectedIdentifiers":13817,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-12T10:55:30.8237330+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-12T10:55:30.823733+00:00","lastSuccessAt":"2026-11-12T10:55:31.0564011+00:00","error":null,"lastVerifiedAt":"2026-11-12T10:55:31.0564012+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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