{"id":"CVE-2026-44681","aliases":["GHSA-r95x-qfjj-fjj2","PYSEC-2026-188"],"url":"https://o3.security/vulnerability/CVE-2026-44681","summary":"Authlib: Open Redirect in Authlib OIDC Implicit/Hybrid Authorization","details":"Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.6.12 and 1.7.1, an unauthenticated open redirect in Authlib's OpenIDImplicitGrant and OpenIDHybridGrant authorization endpoint lets a remote attacker cause the authorization server to issue an HTTP 302 to an attacker-chosen URL by submitting an authorization request that omits the openid scope. This vulnerability is fixed in 1.6.12 and 1.7.1.","published":"2026-05-27T19:20:44.122Z","modified":"2026-07-15T10:14:42.833823033Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"authlib","fixedVersion":"1.7.1"},{"ecosystem":"PyPI","name":"authlib","fixedVersion":"1.6.12"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44681.json"},{"type":"ADVISORY","url":"https://github.com/authlib/authlib/security/advisories/GHSA-r95x-qfjj-fjj2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44681"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T10:14:42.833823033Z"}}