CVE-2026-34538

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Source
https://cve.org/CVERecord?id=CVE-2026-34538
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34538.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-34538
Aliases
Downstream
Related
Published
2026-04-09T09:09:20.906Z
Modified
2026-08-07T11:49:52.899961920Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
Apache Airflow: Authorization bypass in DagRun wait endpoint (XCom exposure)
Details

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.

Database specific 
{
    "cwe_ids": [
        "CWE-668"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34538.json",
    "cna_assigner": "apache"
}
References

Affected packages

Git / github.com/apache/airflow

Affected ranges

Type
GIT
Repo
https://github.com/apache/airflow
Events
Introduced
1fc3442f1307fdf5e1221b26f41266c4fed330d3
Fixed
37069948c093e4b6720ec4821ff0ed7d6c069935
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "3.0.0"
        },
        {
            "fixed": "3.2.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34538.json"