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CVE-2026-58076— Apache Airflow: Unguarded import_string() of airflow_exc_ser / base_exc_ser exception nodes in BaseSerialization.deserialize enables DAG-author RCE on Scheduler / API Server

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 3.0.0版本至3.3.1之前版本存在反序列化注入漏洞，该漏洞源于序列化层在重建异常节点时，对序列化数据中的类名调用import_string()并无限制地导入及实例化任意可调用对象，攻击者可通过executor_config参数触发，导致任意代码执行。

AI Predicted 9.8 Difficulty: Easy EPSS 0.92% · P59

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Airflow 3.0.0< 3.3.1 affected
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I. Basic Information for CVE-2026-58076

Vulnerability Information
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Vulnerability Title
Apache Airflow: Unguarded import_string() of airflow_exc_ser / base_exc_ser exception nodes in BaseSerialization.deserialize enables DAG-author RCE on Scheduler / API Server
Source: CVE Program / CVE List V5
Vulnerability Description
Apache Airflow's serialization layer reconstructed exception nodes by calling `import_string()` on a class name taken from the serialized blob and instantiating it with arguments from the same blob, with no restriction on what could be imported. An operator's `executor_config` reaches that branch, so a Dag author could place a value there that causes an arbitrary callable to be imported and invoked -- for example `subprocess.check_output`, or `builtins.eval` on the `builtins`-prefixed variant. The code runs in the **Scheduler**, which reconstructs serialized Dags in its normal loop with no request involved, and in the **API server**, on any authenticated read of the Dag such as `GET /api/v2/dags/{dag_id}/details`. Both are components the Airflow security model states must never execute Dag-author code, and both hold the metadata database credentials and the JWT signing secret. No non-default configuration is required. This is a **different sink from CVE-2026-33264**, which covered only the trigger branch of the same deserializer: deployments that upgraded in response to that advisory are still affected through the exception branch and must upgrade again. Users are advised to upgrade to apache-airflow 3.3.1 or later, which restricts the imported class to a subclass of `BaseException`.
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 3.0.0版本至3.3.1之前版本存在反序列化注入漏洞，该漏洞源于序列化层在重建异常节点时，对序列化数据中的类名调用import_string()并无限制地导入及实例化任意可调用对象，攻击者可通过executor_config参数触发，导致任意代码执行。
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 3.0.0 ~ 3.3.1 -

II. Public POCs for CVE-2026-58076

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III. Intelligence Information for CVE-2026-58076

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Patches & Fixes for CVE-2026-58076 (1)

Mailing List Discussions for CVE-2026-58076 (1)

Other References for CVE-2026-58076 (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-2026-59242 Apache Airflow: Arbitrary airflow.* class instantiation on the API server via the XCom des
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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