CVE-2026-33858

CWE-502 — Deserialization of Untrusted Data4 documents4 sources
Severity
8.8HIGH
EPSS
No EPSS data
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Apache Software Foundation Apache Airflow
Timeline
PublishedApr 13

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages1 packages

🔴Vulnerability Details

3
GHSA
GHSA-mc4f-r875-v87w: Dag Authors, who normally should not be able to execute code in the webserver context could craft XCom payload causing the webserver to execute arbitr↗2026-04-13
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CVEList
Apache Airflow: Unsafe Deserialization via Legacy Serialization Keys (__type/__var) Bypass in XCom API↗2026-04-13
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VulDB
Apache Airflow up to 3.1.x deserialization (EUVD-2026-21978)↗2026-04-13
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