AUGUST 15, 2026
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Case File

CVE-2026-59242

MEDIUM · CVSS 5.4 EPSS 0.25% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-12 · Last synced 2026-08-15

CyberRota Analysis

AI-Generated

Apache Airflow is vulnerable due to an insecure deserialization flaw in the XCom API endpoint, allowing authenticated users with write and read access to instantiate arbitrary classes on the server. This could lead to unauthorized actions or data exposure, making it critical for organizations using Apache Airflow to prioritize upgrading to version 3.3.1 or later to mitigate this risk. Users with the ability to manipulate XCom values should take immediate action to secure their environments.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-59242
Severity
MEDIUM
CVSS
5.4
EPSS
0.25%
Apache

Original NVD Description

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.

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