{"schemaVersion":3,"id":"CVE-2026-39976","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Laravel Passport provides OAuth2 server support to Laravel. From 13.0.0 to before 13.7.1, there is an Authentication Bypass for client_credentials tokens. the league/oauth2-server library sets the JWT sub claim to the client identifier (since there's no user). The token guard then passes this value to retrieveById() without validating it's actually a user identifier, potentially resolving an unrelated real user. Any machine-to-machine token can inadvertently authenticate as an actual user. This vulnerability is fixed in 13.7.1.","dates":{"published":"2026-04-09T16:50:42.326Z","modified":"2026-04-09T19:31:53.801Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.1,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00395,"percentile":0.32276,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.10600000000000001,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00289},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00289,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00289,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00289,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00289,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00289,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00289,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00289,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00289,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00289,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00289,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00395,"percentile":0.32276}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00289,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00289,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00289,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00289,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00395,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00395,"percentile":0.32276}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"GITHUB_LARAVEL_PASSPORT","name":"Passport","source":"github","url":"https://github.com/laravel/passport/issues/1900","maturity":"poc","reliabilityScore":0.3,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-287","name":"Improper Authentication","description":"When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/287.html"}],"affected":[{"vendor":"laravel","product":"passport","name":"passport","label":"passport","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 13.0.0, < 13.7.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 13.0.0, < 13.7.1","eol":null,"hubHref":"/vendor/laravel/passport"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/laravel/passport/security/advisories/GHSA-349c-2h2f-mxf6","label":"github.com/laravel/passport/security/advisories/GHSA-349c-2h2f-mxf6","hostname":"github.com","tags":["X Refsource CONFIRM","Mitigation","Vendor Advisory"]},{"url":"https://github.com/laravel/passport/issues/1900","label":"github.com/laravel/passport/issues/1900","hostname":"github.com","tags":["X Refsource MISC","Exploit","Issue Tracking"]},{"url":"https://github.com/thephpleague/oauth2-server/issues/1456#issuecomment-2734989996","label":"github.com/thephpleague/oauth2-server/issues/1456","hostname":"github.com","tags":["X Refsource MISC","Issue Tracking","Patch"]},{"url":"https://github.com/laravel/passport/pull/1901","label":"github.com/laravel/passport/pull/1901","hostname":"github.com","tags":["X Refsource MISC","Issue Tracking","Patch"]},{"url":"https://github.com/laravel/passport/pull/1902","label":"github.com/laravel/passport/pull/1902","hostname":"github.com","tags":["X Refsource MISC","Issue Tracking","Patch"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-04-09T16:50:42.326Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-09T19:31:53.801Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":38,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T06:56:15.543Z","stale":false,"partial":false}}