{"cve":"CVE-2026-44681","nvd":{"published":"2026-05-27T20:16:37.463","modified":"2026-06-17T10:51:14.020","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-601","CWE-863"],"references":["https://github.com/authlib/authlib/security/advisories/GHSA-r95x-qfjj-fjj2","https://github.com/authlib/authlib/security/advisories/GHSA-r95x-qfjj-fjj2"],"products":["authlib:authlib"],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2026-44681","score":0.00249,"percentile":0.16269,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-r95x-qfjj-fjj2","url":"https://osv.dev/vulnerability/GHSA-r95x-qfjj-fjj2","summary":"Authlib OIDC Implicit/Hybrid Authorization Vulnerable to Open Redirect","modified":"2026-09-10T03:50:47.482305215Z","packages":[{"ecosystem":"PyPI","name":"authlib","purl":"pkg:pypi/authlib","ranges":[">=1.7.0 <1.7.1"],"fixed":["1.7.1"]},{"ecosystem":"PyPI","name":"authlib","purl":"pkg:pypi/authlib","ranges":["<1.6.12"],"fixed":["1.6.12"]}]},{"id":"PYSEC-2026-188","url":"https://osv.dev/vulnerability/PYSEC-2026-188","summary":"","modified":"2026-06-03T12:45:18.233136446Z","packages":[{"ecosystem":"PyPI","name":"authlib","purl":"pkg:pypi/authlib","ranges":["<1.6.12"],"fixed":["1.6.12"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}