CVE-2026-41479 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-41479MEDIUM

Authlib OAuth 2.0 authorization endpoint open redirects to attacker-controlled redirect_uri on unsupported response_type

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   R  U  L  L  N    5.4   .0018    8.2     —

AFFECTED
  Product  Versions    Fixed
  authlib  < 1.6.10 –  —

TIMELINE
  Apr 20  Reserved by GitHub_M
  Jun 22  EXPLOIT PUBLISHED — CVE-2026-41479 (authlib). Public exploit reference added.
  Jun 22  Published (CNA: GitHub_M)

CWE-601 · CNA: GitHub_M · CVSS v3.1 · 2 references · NVD status: Analyzed

Description

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.6.10 and 1.7.1, Authlib's OAuth 2.0 authorization endpoint can be turned into an unauthenticated open redirect when a request uses an unsupported response_type and supplies an attacker-controlled redirect_uri. The vulnerable behavior happens before client lookup and before any redirect URI validation. As a result, an attacker does not need a valid client registration, an authenticated user, or any prior state. A single request to the authorization endpoint is enough to obtain a 302 Location response to an arbitrary attacker-controlled URL. This vulnerability is fixed in 1.6.10 and 1.7.1.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
April 20, 2026	Reserved	Reserved by GitHub_M
June 22, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-41479 (authlib). Public exploit reference added.
June 22, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
authlib	authlib	—	< 1.6.10	—

Weaknesses

CWE-601

References (2)

https://github.com/authlib/authlib/commit/3be08468201a7766a93012ce149ea12822cab096 [Patch]
https://github.com/authlib/authlib/security/advisories/GHSA-w8p2-r796-3vmq [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-41479 at cve.org

Vendors: authlib

Weaknesses: CWE-601

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-41479 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.