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.
Published: 2026-04-13
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: Remote Code Execution
Action: Patch
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-mc4f-r875-v87w Apache Airflow: Unsafe Deserialization via Legacy Serialization Keys (__type/__var) Bypass in XCom API
History

Fri, 17 Apr 2026 18:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*

Tue, 14 Apr 2026 16:30:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache airflow
Vendors & Products Apache
Apache airflow

Mon, 13 Apr 2026 17:30:00 +0000

Type Values Removed Values Added
References

Mon, 13 Apr 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 13 Apr 2026 15:00:00 +0000

Type Values Removed Values Added
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.
Title Apache Airflow: Unsafe Deserialization via Legacy Serialization Keys (__type/__var) Bypass in XCom API
Weaknesses CWE-502
References

cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-04-14T03:55:30.291Z

Reserved: 2026-03-24T09:30:31.093Z

Link: CVE-2026-33858

cve-icon Vulnrichment

Updated: 2026-04-13T16:26:57.075Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-13T15:17:33.343

Modified: 2026-04-17T18:40:56.003

Link: CVE-2026-33858

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-14T16:34:17Z

Weaknesses