CVE-2026-26929: Apache Airflow Wildcard DagVersion Listing Bypasses Per‑DAG Vulnerability

HIGH
Advisory Identifier: GHSA-4m3h-wp5w-5hqh
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CVSS 7.5
CWE-732
Published
Advisory Summary

CVE-2026-26929 is a HIGH (CVSS 7.5) wildcard dagversion listing bypasses per‑dag vulnerability (CWE-732: Incorrect Permission Assignment for Critical Resource) affecting Apache Airflow libraries in the PyPI ecosystem. The issue involves wildcard dagversion listing bypasses per‑dag rbac and leaks metadata. Remediation is available by upgrading affected packages to version 3.1.8.

CVE-2026-26929 at a Glance

CVE Identifier CVE-2026-26929
GHSA Identifier GHSA-4m3h-wp5w-5hqh
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-732: Incorrect Permission Assignment for Critical Resource
Affected Product Apache Airflow
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-26929

To remediate this vulnerability, upgrade all affected Apache Airflow dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

apache-airflow fixed: 3.1.8 
pip install apache-airflow>=3.1.8
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show apache-airflow

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-26929, inspect your installed packages using pip:

pip show apache-airflow

Analyze the terminal output to locate any version of Apache Airflow in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.1.8), your application is affected.

Note: The pip show apache-airflow command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-732: Incorrect Permission Assignment for Critical Resource, where the product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. In Apache Airflow, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Apache Airflow versions 3.0.0 through 3.1.7 FastAPI DagVersion listing API does not apply per-DAG authorization filtering when the request is made with dag_id set to "~" (wildcard for all DAGs). As a result, version metadata of DAGs that the requester is not authorized to access is returned. Users are recommended to upgrade to Apache Airflow 3.1.8 or later, which resolves this issue.

CVE-2026-26929 Affected Apache Airflow Versions

1 component(s)
Fixed Versions:
3.1.8
Product / Package Ecosystem Affected Versions Fixed Version
apache-airflow
pypi/apache-airflow
PyPI
≥ 3.0.0
< 3.1.8
3.1.8

References

NVD — CVE-2026-26929 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-26929
Apache Airflow Source Repository REPOSITORY
https://github.com/apache/airflow/pull/61675
Apache Airflow Source Repository REPOSITORY
https://github.com/apache/airflow
Apache Airflow Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-14.yaml
lists.apache.org/thread/g5o6khx83jwq... WEB
https://lists.apache.org/thread/g5o6khx83jwqvdyn0mlyb0krt35cs9ss
Apache Airflow Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/03/17/4

Frequently Asked Questions

What is CVE-2026-26929?
CVE-2026-26929 is a security vulnerability in Apache Airflow involving Wildcard DagVersion Listing Bypasses Per‑DAG RBAC and Leaks Metadata under CWE-732: Incorrect Permission Assignment for Critical Resource.
Which Apache Airflow versions are affected?
Affected versions include releases prior to 3.1.8 across affected packages: apache-airflow.
What version fixes CVE-2026-26929?
Upgrading to 3.1.8 (or the latest patched release for your respective branch) resolves the vulnerability.
Is apache-airflow affected?
Yes, apache-airflow is affected in releases prior to 3.1.8. Upgrade your dependency to 3.1.8 or later.
What is the CVSS score of CVE-2026-26929?
CVE-2026-26929 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2026-26929?
CVE-2026-26929 is classified under CWE-732: Incorrect Permission Assignment for Critical Resource (The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.).
How can I check PyPI dependencies for CVE-2026-26929?
Run the dependency tree command: 'pip show apache-airflow'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-4m3h-wp5w-5hqh",
  "modified" : "2026-06-05T14:26:02Z",
  "published" : "2026-03-17T12:30:19Z",
  "aliases" : [ "CVE-2026-26929" ],
  "summary" : "Apache Airflow: Wildcard DagVersion Listing Bypasses Per‑DAG RBAC and Leaks Metadata",
  "details" : "Apache Airflow versions 3.0.0 through 3.1.7 FastAPI DagVersion listing API does not apply per-DAG authorization filtering when the request is made with dag_id set to \"~\" (wildcard for all DAGs). As a result, version metadata of DAGs that the requester is not authorized to access is returned.\n\n\nUsers are recommended to upgrade to Apache Airflow 3.1.8 or later, which resolves this issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "apache-airflow"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0"
      }, {
        "fixed" : "3.1.8"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-26929"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/airflow/pull/61675"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/airflow"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-14.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/g5o6khx83jwqvdyn0mlyb0krt35cs9ss"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/03/17/4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-732" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-18T16:19:16Z",
    "nvd_published_at" : "2026-03-17T11:16:11Z"
  }
}