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Message-ID: <e7923a9f-c4de-2d86-6098-debe70249584@apache.org>
Date: Mon, 13 Apr 2026 14:21:22 +0000
From: Rahul Vats <rahulvats@...che.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2026-33858: Apache Airflow: Unsafe Deserialization via Legacy
Serialization Keys (__type/__var) Bypass in XCom API
Severity: low
Affected versions:
- Apache Airflow (apache-airflow) 3.1.8 before 3.2.0
Description:
Dag Authors, who normally should not be able to execute code in the webserver context could craft XCom payload causing the webserver to execute arbitrary code. Since Dag Authors are already highly trusted, severity of this issue is Low.
Users are recommended to upgrade to Apache Airflow 3.2.0, which resolves this issue.
Credit:
wooseokdotkim (finder)
Amogh Desai (remediation developer)
References:
https://github.com/apache/airflow/pull/64148
https://airflow.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-33858
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