CVE-2026-34538

mediumpriority · track · 0EPSS 0.007 · 52 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.69% (52nd) EPSS

CVSS 6.5 · medium

Is it mine?

6 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · osv · cert_bund

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nsecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nsecondaryexploitability 2.8 · impact 3.6

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nsecondary · OSV

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-668USCWE-668US

affected products (6)

Products and version ranges known to be affected.

Apache Airflow <3.2.0all versionscert_bundDE
Apache Airflow< 3.2.0cert_bundDE
Apache Software Foundation Apache Airflow3.0.0 → 3.2.0enisa_euvdEU
apache airflow3.0.0 → 3.2.0nvdUScpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*
Bitnami airflow3.0.0 → 3.2.0osvUSpkg:bitnami/airflow
PyPI apache-airflow3.0.0 → 3.2.0osvUSpkg:pypi/apache-airflow

advisories (4)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1042Apache Airflow: Mehrere SchwachstellenDeutsch2026-04-09csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Apache Airflow ausnutzen, um Sicherheitsvorkehrungen zu umgehen und vertrauliche Informationen offenzulegen.
GHSA-r7vr-m4jw-r794Apache Airflow has an authorization bypass in DagRun wait endpoint2026-04-09ghsa · osvUS
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.
BIT-airflow-2026-34538Apache Airflow: Authorization bypass in DagRun wait endpoint (XCom exposure)2026-04-13vendor · osvUS
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.
PYSEC-2026-212026-04-09vendor · osvUS
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.

also known as (7)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv cert_bund nvd NVD CVE.org MITRE

published 2026-04-09modified 2026-10-26

references (8)

External citations — patches, advisories, analysis.

http://www.openwall.com/lists/oss-security/2026/04/09/9 cnnvd
https://github.com/apache/airflow/pull/64415 cnnvd
https://lists.apache.org/thread/9mq3msqhmgjwdzbr6bgthj4brb3oz9fl cnnvd
https://github.com/apache/airflow/pull/64415 enisa_euvd
https://lists.apache.org/thread/9mq3msqhmgjwdzbr6bgthj4brb3oz9fl enisa_euvd
http://www.openwall.com/lists/oss-security/2026/04/09/9Mailing ListThird Party Advisorynvd
https://github.com/apache/airflow/pull/64415Broken LinkIssue Trackingnvd
https://lists.apache.org/thread/9mq3msqhmgjwdzbr6bgthj4brb3oz9flMailing ListVendor Advisorynvd

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