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TI-2026-26787 Aliases CVE-2026-34538GHSA-r7vr-m4jw-r794

Apache Airflow: Authorization bypass in DagRun wait endpoint (XCom exposure)

Priority LOW 30CWE-668Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-668 and the CVSS impact.

Summary

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 model documentation that defines the Viewer role as read-only. Airflow uses the FAB Auth Manager to manage access control on a per-resource basis. The Viewer role is intended to be read-only by default, and the security model documentation defines Viewer users as those who can inspect DAGs without accessing sensitive execution results. Users are recommended to upgrade to Apache Airflow 3.2.0 which resolves this issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00697 53rd percentileScored 2026-11-07
Fix Fixed Apache Airflow (Apache Software Foundation): 3.2.0apache-airflow (PyPI): 3.2.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Airflow3.0.0 to before 3.2.03.2.0Patch availableCNA
—apache-airflow (PyPI)3.0.0 to before 3.2.03.2.0Patch availableGHSA-r7vr-m4jw-r794
  • Apache Airflow VendorApache Affected 3.0.0 to before 3.2.0 Fixed in 3.2.0 Patch available CNA
  • apache-airflow (PyPI) Vendor— Affected 3.0.0 to before 3.2.0 Fixed in 3.2.0 Patch available GHSA-r7vr-m4jw-r794

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*3.0.0 to before 3.2.0VulnerableApache
  • cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:* Versions 3.0.0 to before 3.2.0 Vulnerable ·Apache

Remediation

  • Fix · CNA Apache Airflow (Apache Software Foundation) Fixed in 3.2.0
  • Fix · GHSA-r7vr-m4jw-r794 apache-airflow (PyPI) Fixed in 3.2.0 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apache Airflow 3.2.0

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2025-35631 Apache Airflow: Airflow Logout Not Invalidating JWTPriority MEDIUM 46
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-34538
  2. 2026-10-03 Alias added: GHSA-r7vr-m4jw-r794
  3. 2026-11-03 Fix available: [email protected] · CNA

References

Patch 1

Advisory 3

Other 3

  • TI-2020-10905 Missing authentication in Apache Airflow KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-09638 OS command injection in Apache Airflow KEVCVSS 3.1HIGH 8.8
  • TI-2022-19017 Apache Airflow <2.4.0 has an RCE in a bash example CVSS 3.1HIGH 8.8
  • TI-2021-16140 Apache Airflow: Variable Import endpoint missed authentication check CVSS 3.1CRITICAL 9.8
  • TI-2022-08169 Apache Airflow: RCE in example DAGs CVSS 3.1HIGH 8.8
  • TI-2024-26776 Apache Airflow: DAG Author Code Execution possibility in airflow-scheduler CVSS 3.1HIGH 8.8
See all 157 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences