CVE-2026-59242 (GCVE-0-2026-59242)

Vulnerability from cvelistv5 – Published: 2026-08-12 15:35 – Updated: 2026-09-16 14:55
VLAI
Title
Apache Airflow: Arbitrary airflow.* class instantiation on the API server via the XCom deserialize endpoint
Summary
Apache Airflow's XCom `GET /api/v2/{...}/xcomEntries/{key}?deserialize=true` endpoint passed a string-literal payload through `BaseXCom.deserialize_value` without the `_check_forbidden_xcom_keys` guard, allowing an authenticated API user with XCom write-and-read access to instantiate arbitrary `airflow.*` classes on the API server (CWE-502). An authenticated user who can write an XCom value and then read it back with `deserialize=true` triggers the unsafe instantiation. Users are advised to upgrade to apache-airflow 3.3.1 or later, which rejects reserved XCom serialization keys submitted as JSON string literals.
Severity
5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 16:41 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
apache CNA under the mitre root
CNA scorecard B 76/100 over 1088 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Apache Software Foundation Apache Airflow Affected: 0 , < 3.3.1 (semver)
guessed Create a notification for this product.
Credits
localhost-detect (@localhost-detect) Jarek Potiuk
Show details on NVD website
To clipboard 

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