Session fixation via missing OAuth state validation
Published Apr 18, 2026 · Updated Apr 18, 2026
Login CSRF in Apache Airflow Providers Keycloak before 0.7.0 allows remote authenticated users to log victims into attacker-controlled sessions. The login route sent Keycloak authorization requests without a state value, and the callback accepted authorization codes without comparing request state. Exploitation requires a Keycloak account in the victim's realm and victim interaction with a crafted callback; the resulting attacker-controlled Airflow session exposes credentials the victim later saves in Connections.
Summary
What happened
Login CSRF in Apache Airflow Providers Keycloak before 0.7.0 allows remote authenticated users to log victims into attacker-controlled sessions. The login route sent Keycloak authorization requests without a state value, and the callback accepted authorization codes without comparing request state. Exploitation requires a Keycloak account in the victim's realm and victim interaction with a crafted callback; the resulting attacker-controlled Airflow session exposes credentials the victim later saves in Connections.
The record
- CVE
- CVE-2026-40948
- Published
- Apr 18, 2026
- Updated
- Apr 18, 2026
- Vendor
- The Apache Software Foundation
- Product
- Apache Airflow
- Classifications
- CWE-352, T1204.002
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 18, 2026CVE publishedPublication date reported by the CVE source.
- Apr 18, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0.0.1 <0.7.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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