{"id":"CVE-2026-114614","revision":null,"records":[{"revision":"a04b9c0d6ed8415e92ad9db240e866a3","observedAt":"2026-10-29T15:12:12.364+00:00","statement":{"source":"cve-program","id":"CVE-2026-114614","aliases":[],"title":"Authlib: is_secure_transport() loopback exemption can be bypassed with a userinfo component, allowing cleartext-HTTP URLs to non-loopback hosts","description":"Authlib is a Python library which builds OAuth and OpenID Connect servers. From 0.13 until 1.8.0, authlib.common.security.is_secure_transport() uses a textual prefix comparison for loopback HTTP exemptions, so a URL whose userinfo begins with a loopback host can be accepted even when its parsed host is an external non-loopback system. An external party able to supply a URL to OIDC RP-Initiated Logout registration, authorization-server metadata validation, or another call site can bypass the TLS-required guard and cause cleartext redirection or acceptance of cleartext endpoints. The issue does not bypass redirect URI exact matching and does not by itself forge tokens or authenticate users. The vulnerable authlib.common.security.is_secure_transport() implementation in authlib/common/security.py misinterprets the userinfo component before OIDC RP-Initiated Logout dynamic client registration and other consumers enforce transport security. This issue is fixed in version 1.8.0.","state":0,"publishedAt":"2026-10-22T21:00:14.354+00:00","modifiedAt":"2026-10-29T13:49:50.607+00:00","affected":[{"ecosystem":"Vendor product","name":"authlib","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"authlib\",\n                    \"product\": \"authlib\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.8.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N","score":2.6,"severity":"LOW"}],"references":["https://github.com/authlib/authlib/security/advisories/GHSA-jj7h-c3hg-m23x","https://github.com/authlib/authlib/commit/95ad1f90acf0c7b9cf2a8f25e6eb3f1135b8dc70","https://github.com/authlib/authlib/releases/tag/v1.8.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114614","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-114614","identifiers":["CVE-2026-114614"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-11-07T07:27:10.0308911+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-07T07:27:10.0308911+00:00","lastSuccessAt":"2026-11-07T07:27:10.181531+00:00","error":null,"lastVerifiedAt":"2026-11-07T07:27:10.1815313+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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