---
cve: "CVE-2026-44681"
severity: "MEDIUM"
cvss: 6.1
epss: "0.3%"
vendor: "authlib"
kev: false
exploited: false
published: "2026-05-27 20:16:37"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-11-10T19:44:59+01:00"
---

# CVE-2026-44681

> 6.1 MEDIUM · 🧪 PoC

## Beschreibung

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.

## CNA-Record (Kanon, cvelistV5)

- CNA: **GitHub_M**
- State: PUBLISHED
- Stand: 2026-06-02 16:56:48
- CNA-CVSS: **6.1** (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Schwachstellen-Klasse

- **CWE-601** — URL Redirection to Untrusted Site
  The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.
- **CWE-863** — Incorrect Authorization
  The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

## Angriffsmuster (CAPEC)

- [CAPEC-178 — Cross-Site Flashing](https://capec.mitre.org/data/definitions/178.html) _(Severity: Medium)_

## Patch verfügbar (OSV)

- e46e515b3a87ea63ab0606b248d75f69d83a2391 (Commit)

## Referenzen

- <https://github.com/authlib/authlib/security/advisories/GHSA-r95x-qfjj-fjj2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-44681/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_