Cross-account authorization via unbound token cookies
Published Sep 16, 2026 · Updated Sep 16, 2026
Authorization bypass in Apache Airflow Keycloak provider before 0.10.0 allows remote authenticated users to assume another subject's privileges. On Airflow 3.3 and later, the auth manager trusts the identity in a signed Airflow session token but authorizes with separate cookie-supplied Keycloak tokens without verifying a matching subject. Exploitation requires a valid Airflow login and another subject's token obtained out of band; requests receive the foreign token's privileges while audit and cache identity remains the attacker's account.
Summary
What happened
Authorization bypass in Apache Airflow Keycloak provider before 0.10.0 allows remote authenticated users to assume another subject's privileges. On Airflow 3.3 and later, the auth manager trusts the identity in a signed Airflow session token but authorizes with separate cookie-supplied Keycloak tokens without verifying a matching subject. Exploitation requires a valid Airflow login and another subject's token obtained out of band; requests receive the foreign token's privileges while audit and cache identity remains the attacker's account.
The record
- CVE
- CVE-2026-76186
- Published
- Sep 16, 2026
- Updated
- Sep 16, 2026
- Vendor
- Apache Software Foundation
- Product
- Apache Airflow Keycloak provider
- Classifications
- T1550.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 16, 2026CVE publishedPublication date reported by the CVE source.
- Sep 16, 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 <0.10.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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