CVE-2026-42526: Apache Airflow Amazon provider Prevent Unauthorized Access To Team-scoped Vulnerability

MODERATE
Advisory Identifier: GHSA-g9qc-qf28-hhqx
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CVSS 5.3
CWE-863
Published
Advisory Summary

CVE-2026-42526 is a MODERATE (CVSS 5.3) prevent unauthorized access to team-scoped vulnerability (CWE-863: Incorrect Authorization) affecting Apache Airflow Amazon provider libraries in the PyPI ecosystem. The issue involves prevent unauthorized access to team-scoped secrets in aws secrets manager and ssm parameter store backends. Remediation is available by upgrading affected packages to version 9.28.0.

CVE-2026-42526 at a Glance

CVE Identifier CVE-2026-42526
GHSA Identifier GHSA-g9qc-qf28-hhqx
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-863: Incorrect Authorization
Affected Product Apache Airflow Amazon provider
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 5.3

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

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
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-2026-42526

To remediate this vulnerability, upgrade all affected Apache Airflow Amazon provider 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-providers-amazon fixed: 9.28.0 
pip install apache-airflow-providers-amazon>=9.28.0
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-providers-amazon

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-42526, inspect your installed packages using pip:

pip show apache-airflow-providers-amazon

Analyze the terminal output to locate any version of Apache Airflow Amazon provider in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 9.28.0), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-863: Incorrect Authorization, where the product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. In Apache Airflow Amazon provider, 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

In the AWS Secrets Manager and SSM Parameter Store secrets backends of `apache-airflow-providers-amazon` prior to 9.28.0, the team-scoping logic could resolve a `conn_id` containing a `/` (e.g. `"my_team/conn"`) to the same path as another team's team-scoped secret when the caller had no team context. A privileged caller without team context could therefore retrieve another team's secret by crafting a colliding `conn_id`. Fixed in 9.28.0 by switching the team-scope separator to `--` and rejecting team-shaped `conn_id`s when team context is absent. Affects the experimental multi-tenant teams feature only. Users are recommended to upgrade to `apache-airflow-providers-amazon` 9.28.0, which fixes the issue.

CVE-2026-42526 Affected Apache Airflow Amazon provider Versions

1 component(s)
Fixed Versions:
9.28.0
Product / Package Ecosystem Affected Versions Fixed Version
apache-airflow-providers-amazon
pypi/apache-airflow-providers-amazon
PyPI
< 9.28.0
9.28.0

References

NVD — CVE-2026-42526 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42526
Apache Airflow Amazon provider Source Repository REPOSITORY
https://github.com/apache/airflow/pull/65703
Apache Airflow Amazon provider Source Repository REPOSITORY
https://github.com/apache/airflow
lists.apache.org/thread/0092sz5g520d... WEB
https://lists.apache.org/thread/0092sz5g520d3qqjb01wd61myqlgjtyn
Apache Airflow Amazon provider Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/05/19/36

Frequently Asked Questions

What is CVE-2026-42526?
CVE-2026-42526 is a security vulnerability in Apache Airflow Amazon provider involving Prevent unauthorized access to team-scoped secrets in AWS Secrets Manager and SSM Parameter Store backends under CWE-863: Incorrect Authorization.
Which Apache Airflow Amazon provider versions are affected?
Affected versions include releases prior to 9.28.0 across affected packages: apache-airflow-providers-amazon.
What version fixes CVE-2026-42526?
Upgrading to 9.28.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is apache-airflow-providers-amazon affected?
Yes, apache-airflow-providers-amazon is affected in releases prior to 9.28.0. Upgrade your dependency to 9.28.0 or later.
What is the CVSS score of CVE-2026-42526?
CVE-2026-42526 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2026-42526?
CVE-2026-42526 is classified under CWE-863: Incorrect Authorization (The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.).
How can I check PyPI dependencies for CVE-2026-42526?
Run the dependency tree command: 'pip show apache-airflow-providers-amazon'. 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 
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  "id" : "GHSA-g9qc-qf28-hhqx",
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  "published" : "2026-05-19T21:32:03Z",
  "aliases" : [ "CVE-2026-42526" ],
  "summary" : "Apache Airflow Amazon provider: Prevent unauthorized access to team-scoped secrets in AWS Secrets Manager and SSM Parameter Store backends",
  "details" : "In the AWS Secrets Manager and SSM Parameter Store secrets backends of `apache-airflow-providers-amazon` prior to 9.28.0, the team-scoping logic could resolve a `conn_id` containing a `/` (e.g. `\"my_team/conn\"`) to the same path as another team's team-scoped secret when the caller had no team context. A privileged caller without team context could therefore retrieve another team's secret by crafting a colliding `conn_id`. Fixed in 9.28.0 by switching the team-scope separator to `--` and rejecting team-shaped `conn_id`s when team context is absent. Affects the experimental multi-tenant teams feature only. Users are recommended to upgrade to `apache-airflow-providers-amazon` 9.28.0, which fixes the issue.",
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