8.8

CVE-2026-33858

Apache Airflow: Unsafe Deserialization via Legacy Serialization Keys (__type/__var) Bypass in XCom API

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Apache ≫ Airflow Version >= 3.1.8 < 3.2.0
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.59% 0.437
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
134c704f-9b21-4f2e-91b3-4a467353bcc0 8.8 2.8 5.9
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-502 Deserialization of Untrusted Data

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

https://github.com/apache/airflow/pull/64148
Issue Tracking
https://lists.apache.org/thread/1npt3o2x81s0gw9tmfcv4n7p1z9hdmy0
Vendor Advisory
Mailing List
http://www.openwall.com/lists/oss-security/2026/04/13/7
Third Party Advisory
Mailing List