Deserialization of Untrusted Data

Overview Affected versions of this package are vulnerable to Deserialization of Untrusted Data via the XCom API. A privileged DAG Author can execute code on the webserver by invoking a class via legacy serialization keys type/var. Details Serialization is a process of converting an object into a...

EUVD-2026-21978

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,...

GHSA-MC4F-R875-V87W Apache Airflow: Unsafe Deserialization via Legacy Serialization Keys (__type/__var) Bypass in XCom API

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,...

CVE-2026-33858

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,...

PYSEC-2026-20

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, whi...

PYSEC-2026-20

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,...

CVE-2026-33858 Apache Airflow: Unsafe Deserialization via Legacy Serialization Keys (__type/__var) Bypass in XCom API

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,...

CVE-2026-33858

The Apache Airflow webserver is vulnerable to Remote Code Execution (RCE) due to unsafe deserialization via legacy serialization keys (__type__, __var) in the XCom API . An attacker with Dag Author privileges can craft a malicious XCom payload that, when processed by the webserver, leads to arbit...

BIT-AIRFLOW-2026-34538 Apache Airflow: Authorization bypass in DagRun wait endpoint (XCom exposure)

Apache Airflow versions 3.0.0 through 3.1.8 DagRun wait endpoint returns XCom result values even to users who only have DAG Run read permissions, such as the Viewer role.This behavior conflicts with the FAB RBAC model, which treats XCom as a separate protected resource, and with the security mode...

CVE-2026-33858: Deserialization of Untrusted Data

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,...

Apache Airflow has an authorization bypass in DagRun wait endpoint

Apache Airflow versions 3.0.0 through 3.1.8 DagRun wait endpoint returns XCom result values even to users who only have DAG Run read permissions, such as the Viewer role.This behavior conflicts with the FAB RBAC model, which treats XCom as a separate protected resource, and with the security mode...

EUVD-2026-20878

Apache Airflow versions 3.0.0 through 3.1.8 DagRun wait endpoint returns XCom result values even to users who only have DAG Run read permissions, such as the Viewer role.This behavior conflicts with the FAB RBAC model, which treats XCom as a separate protected resource, and with the security mode...

GHSA-R7VR-M4JW-R794 Apache Airflow has an authorization bypass in DagRun wait endpoint

Apache Airflow versions 3.0.0 through 3.1.8 DagRun wait endpoint returns XCom result values even to users who only have DAG Run read permissions, such as the Viewer role.This behavior conflicts with the FAB RBAC model, which treats XCom as a separate protected resource, and with the security mode...

CVE-2026-34538

Apache Airflow versions 3.0.0 through 3.1.8 DagRun wait endpoint returns XCom result values even to users who only have DAG Run read permissions, such as the Viewer role.This behavior conflicts with the FAB RBAC model, which treats XCom as a separate protected resource, and with the security mode...

PYSEC-2026-21

Apache Airflow versions 3.0.0 through 3.1.8 DagRun wait endpoint returns XCom result values even to users who only have DAG Run read permissions, such as the Viewer role.This behavior conflicts with the FAB RBAC model, which treats XCom as a separate protected resource, and with the security mode...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization through the waitdagrununtilfinished handler in airflow-core/src/airflow/apifastapi/coreapi/routes/public/dagrun.py. An attacker can read task result values by sending a GET request to the DAG run wait endpoint with...

CVE-2026-34538

Apache Airflow versions 3.0.0 through 3.1.8 contain an authorization bypass in the DagRun wait endpoint . The vulnerability allows users with only DAG Run read permissions , such as the Viewer role , to access XCom result values . This behavior contradicts the FAB RBAC model , which classifies XC...

CVE-2026-34538

Apache Airflow versions 3.0.0 through 3.1.8 DagRun wait endpoint returns XCom result values even to users who only have DAG Run read permissions, such as the Viewer role.This behavior conflicts with the FAB RBAC model, which treats XCom as a separate protected resource, and with the security mode...

CVE-2026-34538 Apache Airflow: Authorization bypass in DagRun wait endpoint (XCom exposure)

Apache Airflow versions 3.0.0 through 3.1.8 DagRun wait endpoint returns XCom result values even to users who only have DAG Run read permissions, such as the Viewer role.This behavior conflicts with the FAB RBAC model, which treats XCom as a separate protected resource, and with the security mode...

CVE-2026-34538 Apache Airflow: Authorization bypass in DagRun wait endpoint (XCom exposure)

Apache Airflow versions 3.0.0 through 3.1.8 DagRun wait endpoint returns XCom result values even to users who only have DAG Run read permissions, such as the Viewer role.This behavior conflicts with the FAB RBAC model, which treats XCom as a separate protected resource, and with the security mode...