PT-2026-31598 · Apache · Apache Airflow

Kevin Yang + 1 · CVE-2026-34538 · Published 2026-04-09 · Updated 2026-04-13

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Apache Airflow versions 3.0.0 through 3.1.8

Description The DagRun wait endpoint in Apache Airflow allows users with DAG Run read permissions, such as the Viewer role, to access XCom result values. This behavior contradicts the intended security model where XCom is a protected resource and the Viewer role should be read-only.

Recommendations Upgrade to Apache Airflow version 3.2.0.

Exploit

Fix

Exposure of Resource to Wrong Sphere

Weakness Enumeration

CWE-668

Related Identifiers

BIT-AIRFLOW-2026-34538

CVE-2026-34538

ECHO-1071-FE4C-2FF9

GHSA-R7VR-M4JW-R794

PYSEC-2026-21

Affected Products

Apache Airflow

References · 18

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34538.json · Exploit
• https://github.com/apache/airflow/pull/64415 · Patch
• https://lists.apache.org/thread/9mq3msqhmgjwdzbr6bgthj4brb3oz9fl · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-34538 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-r7vr-m4jw-r794 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34538 · Security Note
• https://osv.dev/vulnerability/BIT-airflow-2026-34538 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2026-21 · Vendor Advisory
• https://github.com/apache/airflow · Note
• https://github.com/apache/airflow/releases/tag/3.2.0 · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-21.yaml · Note
• https://twitter.com/infoflowcloud/status/2042187362696847726 · Twitter Post
• https://github.com/advisories/GHSA-r7vr-m4jw-r794 · Note
• https://twitter.com/CVEnew/status/2042186490697154724 · Twitter Post
• https://twitter.com/CVEarity/status/2042574387938033744 · Twitter Post