Vulnerability Details CVE-2026-33264
A bug in `BaseSerialization.deserialize()` allowed unrestricted `import_string()` of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to `apache-airflow` 3.3.0 or later. As a defense-in-depth mitigation, deployments where DAG-author trust is limited can restrict the `[core] allowed_deserialization_classes` config to a narrow allowlist.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.016
EPSS Ranking 73.7%
CVSS Severity
CVSS v3 Score 9.8
Products affected by CVE-2026-33264
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cpe:2.3:a:apache:airflow:-
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cpe:2.3:a:apache:airflow:0.1
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cpe:2.3:a:apache:airflow:0.2
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cpe:2.3:a:apache:airflow:0.2.1
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cpe:2.3:a:apache:airflow:0.2.2
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cpe:2.3:a:apache:airflow:0.2.3
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cpe:2.3:a:apache:airflow:0.3
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cpe:2.3:a:apache:airflow:0.3.1
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cpe:2.3:a:apache:airflow:0.3.2
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cpe:2.3:a:apache:airflow:0.4
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cpe:2.3:a:apache:airflow:0.4.1
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cpe:2.3:a:apache:airflow:0.4.2
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cpe:2.3:a:apache:airflow:0.4.3
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cpe:2.3:a:apache:airflow:0.4.5
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cpe:2.3:a:apache:airflow:0.4.6
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cpe:2.3:a:apache:airflow:0.5.0
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cpe:2.3:a:apache:airflow:1.0.0
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cpe:2.3:a:apache:airflow:1.0.1
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cpe:2.3:a:apache:airflow:1.1.0
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cpe:2.3:a:apache:airflow:1.1.1
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cpe:2.3:a:apache:airflow:1.10.0
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cpe:2.3:a:apache:airflow:1.10.1
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cpe:2.3:a:apache:airflow:1.10.10
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cpe:2.3:a:apache:airflow:1.10.11
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cpe:2.3:a:apache:airflow:1.10.12
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cpe:2.3:a:apache:airflow:1.10.13
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cpe:2.3:a:apache:airflow:1.10.14
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cpe:2.3:a:apache:airflow:1.10.15
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cpe:2.3:a:apache:airflow:1.10.2
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cpe:2.3:a:apache:airflow:1.10.5
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cpe:2.3:a:apache:airflow:1.10.6
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cpe:2.3:a:apache:airflow:1.10.7
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cpe:2.3:a:apache:airflow:1.10.8
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cpe:2.3:a:apache:airflow:1.10.9
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cpe:2.3:a:apache:airflow:1.2.0
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cpe:2.3:a:apache:airflow:1.3.0
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cpe:2.3:a:apache:airflow:1.4.0
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cpe:2.3:a:apache:airflow:1.4.1
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cpe:2.3:a:apache:airflow:1.5.0
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cpe:2.3:a:apache:airflow:1.5.1
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cpe:2.3:a:apache:airflow:1.5.2
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cpe:2.3:a:apache:airflow:1.6.0
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cpe:2.3:a:apache:airflow:1.6.1
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cpe:2.3:a:apache:airflow:1.6.2
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cpe:2.3:a:apache:airflow:1.7.0
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cpe:2.3:a:apache:airflow:1.7.1
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cpe:2.3:a:apache:airflow:1.7.1.1
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cpe:2.3:a:apache:airflow:1.7.1.2
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cpe:2.3:a:apache:airflow:1.7.1.3
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cpe:2.3:a:apache:airflow:1.8.0
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cpe:2.3:a:apache:airflow:1.8.1
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cpe:2.3:a:apache:airflow:1.8.2
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cpe:2.3:a:apache:airflow:1.9.0
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cpe:2.3:a:apache:airflow:2.0.0
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cpe:2.3:a:apache:airflow:2.0.1
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cpe:2.3:a:apache:airflow:2.0.2
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cpe:2.3:a:apache:airflow:2.1.0
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cpe:2.3:a:apache:airflow:2.1.1
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cpe:2.3:a:apache:airflow:2.1.2
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cpe:2.3:a:apache:airflow:2.1.3
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cpe:2.3:a:apache:airflow:2.1.4
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cpe:2.3:a:apache:airflow:2.10.0
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cpe:2.3:a:apache:airflow:2.10.1
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cpe:2.3:a:apache:airflow:2.10.2
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cpe:2.3:a:apache:airflow:2.10.3
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cpe:2.3:a:apache:airflow:2.10.4
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cpe:2.3:a:apache:airflow:2.10.5
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cpe:2.3:a:apache:airflow:2.11.0
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cpe:2.3:a:apache:airflow:2.11.1
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cpe:2.3:a:apache:airflow:2.2.0
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cpe:2.3:a:apache:airflow:2.2.1
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cpe:2.3:a:apache:airflow:2.2.2
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cpe:2.3:a:apache:airflow:2.2.3
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cpe:2.3:a:apache:airflow:2.2.4
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cpe:2.3:a:apache:airflow:2.2.5
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cpe:2.3:a:apache:airflow:2.3.0
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cpe:2.3:a:apache:airflow:2.3.1
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cpe:2.3:a:apache:airflow:2.3.3
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cpe:2.3:a:apache:airflow:2.3.4
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cpe:2.3:a:apache:airflow:2.4.0
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cpe:2.3:a:apache:airflow:2.4.1
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cpe:2.3:a:apache:airflow:2.4.3
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cpe:2.3:a:apache:airflow:2.5.0
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cpe:2.3:a:apache:airflow:2.6.0
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cpe:2.3:a:apache:airflow:2.6.1
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cpe:2.3:a:apache:airflow:2.6.2
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cpe:2.3:a:apache:airflow:2.6.3
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cpe:2.3:a:apache:airflow:2.7.0
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cpe:2.3:a:apache:airflow:2.7.1
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cpe:2.3:a:apache:airflow:2.7.2
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cpe:2.3:a:apache:airflow:2.7.3
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cpe:2.3:a:apache:airflow:2.8.0
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cpe:2.3:a:apache:airflow:2.8.1
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cpe:2.3:a:apache:airflow:2.8.2
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cpe:2.3:a:apache:airflow:2.8.3
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cpe:2.3:a:apache:airflow:2.8.4
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cpe:2.3:a:apache:airflow:2.9.0
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cpe:2.3:a:apache:airflow:2.9.1
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cpe:2.3:a:apache:airflow:2.9.2
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cpe:2.3:a:apache:airflow:2.9.3
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cpe:2.3:a:apache:airflow:3.0.0
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cpe:2.3:a:apache:airflow:3.0.1
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cpe:2.3:a:apache:airflow:3.0.2
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cpe:2.3:a:apache:airflow:3.0.3
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cpe:2.3:a:apache:airflow:3.0.4
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cpe:2.3:a:apache:airflow:3.0.5
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cpe:2.3:a:apache:airflow:3.0.6
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cpe:2.3:a:apache:airflow:3.1.0
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cpe:2.3:a:apache:airflow:3.1.1
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cpe:2.3:a:apache:airflow:3.1.2
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cpe:2.3:a:apache:airflow:3.1.3
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cpe:2.3:a:apache:airflow:3.1.4
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cpe:2.3:a:apache:airflow:3.1.5
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cpe:2.3:a:apache:airflow:3.1.6
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cpe:2.3:a:apache:airflow:3.1.7
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cpe:2.3:a:apache:airflow:3.1.8
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cpe:2.3:a:apache:airflow:3.2.0
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cpe:2.3:a:apache:airflow:3.2.1
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cpe:2.3:a:apache:airflow:3.2.2