---
id: CVE-2026-40948
aliases:
  - GHSA-5w6h-pjw6-wvc6
  - PYSEC-2026-2369
title: >-
  apache-airflow-providers-keycloak: Missing OAuth 2.0 State and PKCE Enables
  Login CSRF and Session Fixation
summary: >-
  apache-airflow-providers-keycloak: Missing OAuth 2.0 State and PKCE Enables
  Login CSRF and Session Fixation
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'
vendor: apache-airflow-providers-keycloak
product: apache-airflow-providers-keycloak
ecosystem: pip
affected:
  - 'apache-airflow-providers-keycloak >= 0.0.1, < 0.7.0'
patched:
  - apache-airflow-providers-keycloak 0.7.0
published: '2026-04-18'
updated: '2026-07-13'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-5w6h-pjw6-wvc6'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-40948'
  - url: 'https://github.com/apache/airflow/pull/64114'
  - url: 'https://github.com/apache/airflow'
  - url: 'https://lists.apache.org/thread/kc0odpr70hbqhdb9ksnz42fkqz2xld9q'
  - url: 'http://www.openwall.com/lists/oss-security/2026/04/17/14'
tags:
  - osv
  - pip
epss: 0.00328
epssPercentile: 0.26182
ingestedAt: '2026-07-13T18:57:53.491Z'
---

## Overview

The Keycloak authentication manager in `apache-airflow-providers-keycloak` did not generate or validate the OAuth 2.0 `state` parameter on the login / login-callback flow, and did not use PKCE. An attacker with a Keycloak account in the same realm could deliver a crafted callback URL to a victim's browser and cause the victim to be logged into the attacker's Airflow session (login-CSRF / session fixation), where any credentials the victim subsequently stored in Airflow Connections would be harvestable by the attacker. Users are advised to upgrade `apache-airflow-providers-keycloak` to 0.7.0 or later.

## Affected packages

- `apache-airflow-providers-keycloak >= 0.0.1, < 0.7.0`

## Remediation

Upgrade to a patched release:

- `apache-airflow-providers-keycloak 0.7.0`