CVE-2026-40690: Apache airflow Apache Airflow's Asset Dependency Graph Vulnerability

MODERATE
Advisory Identifier: GHSA-w7rc-q6cm-f5gm
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CVSS 4.3
CWE-1220
Published
Advisory Summary

CVE-2026-40690 is a MODERATE (CVSS 4.3) apache airflow's asset dependency graph vulnerability (CWE-1220: Insufficient Granularity of Access Control) affecting Apache airflow libraries in the PyPI ecosystem. The issue involves apache airflow's asset dependency graph did not restrict nodes by the viewer's dag read permissions. Remediation is available by upgrading affected packages to version 3.2.1rc1.

CVE-2026-40690 at a Glance

CVE Identifier CVE-2026-40690
GHSA Identifier GHSA-w7rc-q6cm-f5gm
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-1220: Insufficient Granularity of Access Control
Affected Product Apache airflow
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 4.3

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

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

How to Fix CVE-2026-40690

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: 3.2.1rc1 
pip install apache-airflow>=3.2.1rc1
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-2026-40690, 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 3.2.1rc1), 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-1220: Insufficient Granularity of Access Control, where the product implements access controls via a policy or other feature with the intention to disable or restrict accesses (reads and/or writes) to assets in a system from untrusted agents. however, implemented access controls lack required granularity, which renders the control policy too broad because it allows accesses from unauthorized agents to the security-sensitive assets. 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

The asset dependency graph did not restrict nodes by the viewer's DAG read permissions: a user with read access to at least one DAG could browse the asset graph for any other asset in the deployment and learn the existence and names of DAGs and assets outside their authorized scope. Users are recommended to upgrade to version 3.2.1, which fixes this issue.

CVE-2026-40690 Affected Apache airflow Versions

1 component(s)
Fixed Versions:
3.2.1rc1
Product / Package Ecosystem Affected Versions Fixed Version
apache-airflow
pypi/apache-airflow
PyPI
< 3.2.1rc1
3.2.1rc1

References

NVD — CVE-2026-40690 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-40690
Apache airflow Source Repository REPOSITORY
https://github.com/apache/airflow/pull/65273
Security Fix Commit FIX COMMIT
https://github.com/apache/airflow/commit/cf3452d76e2ef5a8bae247f9fc90c759ff9df02f
Apache airflow Source Repository REPOSITORY
https://github.com/apache/airflow
lists.apache.org/thread/bqt7y4g2cpj3... WEB
https://lists.apache.org/thread/bqt7y4g2cpj396b0sd20lv510ff19ndl
Apache airflow Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/04/24/4

Frequently Asked Questions

What is CVE-2026-40690?
CVE-2026-40690 is a security vulnerability in Apache airflow involving Apache Airflow's asset dependency graph did not restrict nodes by the viewer's DAG read permissions under CWE-1220: Insufficient Granularity of Access Control.
Which Apache airflow versions are affected?
Affected versions include releases prior to 3.2.1rc1 across affected packages: apache-airflow.
What version fixes CVE-2026-40690?
Upgrading to 3.2.1rc1 (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 3.2.1rc1. Upgrade your dependency to 3.2.1rc1 or later.
What is the CVSS score of CVE-2026-40690?
CVE-2026-40690 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2026-40690?
CVE-2026-40690 is classified under CWE-1220: Insufficient Granularity of Access Control (The product implements access controls via a policy or other feature with the intention to disable or restrict accesses (reads and/or writes) to assets in a system from untrusted agents. However, implemented access controls lack required granularity, which renders the control policy too broad because it allows accesses from unauthorized agents to the security-sensitive assets.).
How can I check PyPI dependencies for CVE-2026-40690?
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-w7rc-q6cm-f5gm",
  "modified" : "2026-05-05T18:12:01Z",
  "published" : "2026-04-24T15:32:32Z",
  "aliases" : [ "CVE-2026-40690" ],
  "summary" : "Apache Airflow's asset dependency graph did not restrict nodes by the viewer's DAG read permissions",
  "details" : "The asset dependency graph did not restrict nodes by the viewer's DAG read permissions: a user with read access to at least one DAG could browse the asset graph for any other asset in the deployment and learn the existence and names of DAGs and assets outside their authorized scope.\n\nUsers are recommended to upgrade to version 3.2.1, which fixes this issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "apache-airflow"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.2.1rc1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-40690"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/airflow/pull/65273"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/airflow/commit/cf3452d76e2ef5a8bae247f9fc90c759ff9df02f"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/airflow"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/bqt7y4g2cpj396b0sd20lv510ff19ndl"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/04/24/4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1220" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-05T18:12:01Z",
    "nvd_published_at" : "2026-04-24T13:16:21Z"
  }
}