{"id":"CVE-2026-109283","revision":null,"records":[{"revision":"7600af55f0de49398d122bb773c6af63","observedAt":"2026-10-23T22:48:20.692+00:00","statement":{"source":"cve-program","id":"CVE-2026-109283","aliases":[],"title":"Open WebUI 0.11.1 before 0.11.4 Authorization Bypass via OAuth Token Exchange","description":"Open WebUI from 0.11.1 before 0.11.4 contains an authorization bypass in the OAuth token exchange endpoint, which reads role claims only from the provider's userinfo response and keeps the user's existing role when no roles claim is found, ignoring roles sent only in the ID token. Users with a linked account whose identity provider role no longer satisfies the OAuth role policy can send a valid provider access token to POST /api/v1/auths/oauth/{provider}/token/exchange to obtain a session retaining their previous role.","state":0,"publishedAt":"2026-10-12T16:04:46.013+00:00","modifiedAt":"2026-10-23T21:57:49.217+00:00","affected":[{"ecosystem":"Vendor product","name":"open-webui","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"open-webui\",\n                    \"product\": \"open-webui\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:pypi/open-webui\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0.11.1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"0.11.4\"\n                        },\n                        {\n                            \"version\": \"0.11.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","score":5.3,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","score":5.4,"severity":"MEDIUM"}],"references":["https://github.com/open-webui/open-webui/security/advisories/GHSA-2rr4-q6pg-m5g3","https://www.vulncheck.com/advisories/open-webui-0.11.1-before-0.11.4-authorization-bypass-via-oauth-token-exchange"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-109283","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-109283","identifiers":["CVE-2026-109283"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-10-26T14:35:48.1677058+00:00","complete":true,"records":1756,"lastAttemptAt":"2026-10-26T14:35:48.1677058+00:00","lastSuccessAt":"2026-10-26T14:35:48.3516958+00:00","error":null,"lastVerifiedAt":"2026-10-26T14:35:48.3516975+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-5ba1945314e042c2ced14b33f3680fa71692812d925544312b218f5eb8a26e71-c9e0dc0e630c65d3e2eec6bfd23be086a2f833dd3e7570a16b44670030aaf25b","complete":true,"records":414172,"lastAttemptAt":"2026-10-26T14:35:43.3458888+00:00","lastSuccessAt":"2026-10-26T14:35:43.2997194+00:00","error":null,"lastVerifiedAt":"2026-10-26T14:35:43.3458888+00:00","snapshotPublishedAt":"2026-10-26T13:53:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. 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-43321610382942b8ad8c85917eab1546","complete":false,"records":4735,"lastAttemptAt":"2026-10-26T14:36:16.7068084+00:00","lastSuccessAt":"2026-10-24T23:18:49.862+00:00","error":"InvalidDataException","lastVerifiedAt":"2026-10-24T23:18:49.862+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":4064,"expectedIdentifiers":13477},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-10-26T14:35:48.1677058+00:00","complete":true,"records":1093,"lastAttemptAt":"2026-10-26T14:35:48.1677058+00:00","lastSuccessAt":"2026-10-26T14:35:48.3524508+00:00","error":null,"lastVerifiedAt":"2026-10-26T14:35:48.3524813+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":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. No reader inventory is sent.","generation":"enrichment-ddf1516e1d944b74b0e29872646a7464","complete":true,"records":13416,"lastAttemptAt":"2026-10-26T14:36:14.7824466+00:00","lastSuccessAt":"2026-10-26T14:36:14.779+00:00","error":null,"lastVerifiedAt":"2026-10-26T14:36:14.779+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13477,"expectedIdentifiers":13477},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-2375a4e597279abf92e8747e140fe8da9d421877cd49cae3ac69a2cb78469b2c","complete":true,"records":9779,"lastAttemptAt":"2026-10-26T14:35:43.7672517+00:00","lastSuccessAt":"2026-10-24T13:19:53.1346702+00:00","error":null,"lastVerifiedAt":"2026-10-26T14:35:43.7672517+00:00","snapshotPublishedAt":"2026-10-24T03:03:12+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-16ad89dfea13ab9e9b0108e63a759d63bd4559cc68b58491107d62ee35bbbaf2","complete":true,"records":1965,"lastAttemptAt":"2026-10-26T14:35:43.5489133+00:00","lastSuccessAt":"2026-10-23T16:01:26.4487605+00:00","error":null,"lastVerifiedAt":"2026-10-26T14:35:43.5489133+00:00","snapshotPublishedAt":"2026-10-21T12:18:07+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-a393d8fe0ae8408f3e4cab413b76047090c8e4a3c0a186c79edf33c9a3d3af95","complete":true,"records":2995,"lastAttemptAt":"2026-10-26T14:35:48.1177056+00:00","lastSuccessAt":"2026-10-26T14:35:47.9640893+00:00","error":null,"lastVerifiedAt":"2026-10-26T14:35:48.1177056+00:00","snapshotPublishedAt":"2026-10-26T14:18:55+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-690135177074a0c4b9ddcb48232cb870c32b1a7adcd972a81c224810b8437d0d","complete":true,"records":230805,"lastAttemptAt":"2026-10-26T14:35:43.6565309+00:00","lastSuccessAt":"2026-10-26T12:37:54.7648812+00:00","error":null,"lastVerifiedAt":"2026-10-26T14:35:43.6565309+00:00","snapshotPublishedAt":"2026-10-26T11:48:32+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null}]}