CVE-2026-42358: Apache airflow Apache Airflow Vulnerable To Exposure Vulnerability

MODERATE
Advisory Identifier: GHSA-33g2-gx67-c2h3
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CVSS 6.5
CWE-200
Published
Advisory Summary

CVE-2026-42358 is a MODERATE (CVSS 6.5) apache airflow vulnerable to exposure vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Apache airflow libraries in the PyPI ecosystem. The issue involves apache airflow vulnerable to exposure of sensitive information to an unauthorized actor. Remediation is available by upgrading affected packages to version 3.2.2.

CVE-2026-42358 at a Glance

CVE Identifier CVE-2026-42358
GHSA Identifier GHSA-33g2-gx67-c2h3
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Apache airflow
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 6.5

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:H/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 High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-42358

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: 3.2.2 
pip install apache-airflow>=3.2.2
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-2026-42358, 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 3.2.2), 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-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. 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

A bug in Apache Airflow's Variable response masker caused nested-key redaction (triggered by secret-suffixed key names like `password`, `token`, `secret`, `api_key`) to be bypassed when the JSON value's nesting depth exceeded the shared secrets masker's recursion limit: the masker returned the original nested item before checking the sensitive key name. An authenticated UI/API user with Variable read permission could harvest plaintext secret values stored under sensitive keys nested deep enough to exceed the masker's depth cap. Affects deployments that store sensitive values inside deeply-nested JSON Variables. This is a residual gap in the fix for CVE-2026-32690 (which covered shallower nesting via `max_depth=1`); the depth-limit boundary itself was not raised, so the same key-name bypass pattern reappears beyond the recursion cap. Users who already upgraded for CVE-2026-32690 should additionally upgrade to `apache-airflow` 3.2.2 or later to cover the deep-nesting path.

CVE-2026-42358 Affected Apache airflow Versions

1 component(s)
Fixed Versions:
3.2.2
Product / Package Ecosystem Affected Versions Fixed Version
apache-airflow
pypi/apache-airflow
PyPI
< 3.2.2
3.2.2

References

NVD — CVE-2026-42358 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42358
Apache airflow Source Repository REPOSITORY
https://github.com/apache/airflow/pull/65912
Apache airflow Source Repository REPOSITORY
https://github.com/apache/airflow
lists.apache.org/thread/33635mv3zjb7... WEB
https://lists.apache.org/thread/33635mv3zjb75wn5453c5yf9trs8x2om

Frequently Asked Questions

What is CVE-2026-42358?
CVE-2026-42358 is a security vulnerability in Apache airflow involving Apache Airflow Vulnerable to Exposure of Sensitive Information to an Unauthorized Actor under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Apache airflow versions are affected?
Affected versions include releases prior to 3.2.2 across affected packages: apache-airflow.
What version fixes CVE-2026-42358?
Upgrading to 3.2.2 (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 3.2.2. Upgrade your dependency to 3.2.2 or later.
What is the CVSS score of CVE-2026-42358?
CVE-2026-42358 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2026-42358?
CVE-2026-42358 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check PyPI dependencies for CVE-2026-42358?
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-33g2-gx67-c2h3",
  "modified" : "2026-07-09T20:55:09Z",
  "published" : "2026-06-01T09:31:14Z",
  "aliases" : [ "CVE-2026-42358" ],
  "summary" : "Apache Airflow Vulnerable to Exposure of Sensitive Information to an Unauthorized Actor",
  "details" : "A bug in Apache Airflow's Variable response masker caused nested-key redaction (triggered by secret-suffixed key names like `password`, `token`, `secret`, `api_key`) to be bypassed when the JSON value's nesting depth exceeded the shared secrets masker's recursion limit: the masker returned the original nested item before checking the sensitive key name. An authenticated UI/API user with Variable read permission could harvest plaintext secret values stored under sensitive keys nested deep enough to exceed the masker's depth cap. Affects deployments that store sensitive values inside deeply-nested JSON Variables. This is a residual gap in the fix for CVE-2026-32690 (which covered shallower nesting via `max_depth=1`); the depth-limit boundary itself was not raised, so the same key-name bypass pattern reappears beyond the recursion cap. Users who already upgraded for CVE-2026-32690 should additionally upgrade to `apache-airflow` 3.2.2 or later to cover the deep-nesting path.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "apache-airflow"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.2.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-42358"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/airflow/pull/65912"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/airflow"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/33635mv3zjb75wn5453c5yf9trs8x2om"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-09T20:55:09Z",
    "nvd_published_at" : "2026-06-01T09:16:18Z"
  }
}