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CVE-2026-59242— Apache Airflow: Arbitrary airflow.* class instantiation on the API server via the XCom deserialize endpoint

Quick assessment

Affected
Apache Software Foundation Apache Airflow
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Airflow是美国Apache基金会开源的一个工作流调度和数据处理平台。 Apache Airflow 3.3.1之前版本存在反序列化注入漏洞，该漏洞源于XCom端点在反序列化过程中未对字符串字面量进行 检查，导致经过身份验证的API用户可实例化任意airflow.*类，存在反序列化注入风险。

AI Predicted 8.1 Difficulty: Moderate EPSS 0.58% · P45

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Airflow < 3.3.1 affected
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I. Basic Information for CVE-2026-59242

Vulnerability Information
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Vulnerability Title
Apache Airflow: Arbitrary airflow.* class instantiation on the API server via the XCom deserialize endpoint
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Airflow 反序列化注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Airflow是美国Apache基金会开源的一个工作流调度和数据处理平台。 Apache Airflow 3.3.1之前版本存在反序列化注入漏洞，该漏洞源于XCom端点在反序列化过程中未对字符串字面量进行`_check_forbidden_xcom_keys`检查，导致经过身份验证的API用户可实例化任意airflow.*类，存在反序列化注入风险。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Airflow 0 ~ 3.3.1 -

II. Public POCs for CVE-2026-59242

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III. Intelligence Information for CVE-2026-59242

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Patches & Fixes for CVE-2026-59242 (1)

Mailing List Discussions for CVE-2026-59242 (1)

Same Patch Batch · Apache Software Foundation · 2026-08-12 · 17 CVEs total

CVE-2026-68868 Apache Airflow Google provider: google Secret Manager backend: team scope is never applied
CVE-2026-68076 Apache Airflow: Connections test API: team-scope guard bypass resolves another team's envi
CVE-2026-68971 Apache Airflow: Cross-team authorization bypass in the asset materialization and dag-run r
CVE-2026-68970 Apache Airflow: Values of a list-shaped Variable are not masked in task logs and the Rende
CVE-2026-68969 Apache Airflow: Bulk Variable and Connection endpoints record secret values in the audit l
CVE-2026-68968 Apache Airflow: Authorization bypass in the Backfill API through conflicting interpretatio
CVE-2026-65017 Apache Airflow: Config API: team-scoped Celery broker secret disclosed to a Viewer (multi-
CVE-2026-67587 Apache Airflow: DAG-author remote code execution on the Scheduler via a Serde `Callback` d
CVE-2026-67260 Apache Airflow: DAG-author remote code execution on the Scheduler via awaiting_input next_
CVE-2026-54183 Apache Airflow: Airflow Variables were not masked in the UI for authenticated users
CVE-2026-58076 Apache Airflow: Unguarded import_string() of airflow_exc_ser / base_exc_ser exception node
CVE-2026-59244 Apache Airflow: Secrets masker: `var.json` Variable values not masked in the Rendered Temp
CVE-2026-73240 Apache Allura: Git command injection
CVE-2026-73239 Apache Allura: Missing permission checks IDOR
CVE-2026-73238 Apache Allura: XSS in code display
CVE-2026-73237 Apache Allura: XSS in markdown pipeline

IV. Related Vulnerabilities

Same product: Apache Airflow
Same vendor: Apache Software Foundation
Same weakness: CWE-502

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