CVE-2026-45426: Apache Airflow Incorrect Authorization Vulnerability
Summary
CVE-2026-45426: Apache Airflow has an Incorrect Authorization issue. Affects apache-airflow versions >= 3.0.0, < 3.2.2. Fixed in 3.2.2. How to fix ↓
Also tracked for
- airflow · Bitnami
The same CVE-2026-45426 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
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Background
Apache Airflow is an open-source platform designed to programmatically author, schedule, and monitor workflows. It allows users to define workflows as Directed Acyclic Graphs (DAGs) and provides a rich user interface to manage and visualize these workflows. However, a recent vulnerability has been identified that affects the authorization mechanism of its log server, potentially compromising the security of log access across different DAGs.
Vulnerability Detail
The vulnerability arises from an Incorrect Authorization issue in Apache Airflow's Log server. Attackers who are already authenticated as Airflow workers can exploit this flaw by holding a valid Log-server JWT issued for at least one DAG. The Log server authorizes JWT tokens against DAG IDs using Python's str.lstrip() method, which strips characters from the left side of the string. This means that a JWT issued for a DAG named 'dag_a' could inadvertently authorize access to logs of other DAGs whose names start with any subset of the characters {d, a, g, _}. As a result, an authenticated worker could enumerate and read logs of other DAGs, leaking sensitive task outputs and error traces, thus breaching the intended isolation between DAGs.
How To Fix
Latest published version: 3.3.2 as of 22 Oct 2026
pip install --upgrade "apache-airflow==3.3.2"Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
3.2.2
This is the first release that contains the fix.
pip install --upgrade "apache-airflow==3.2.2"Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. The best course of action is to upgrade to the patched version as soon as possible.
Conclusion
The Incorrect Authorization vulnerability in Apache Airflow (CVE-2026-45426) poses a significant risk to the security of log access across different DAGs. Users are strongly advised to upgrade to version 3.2.2 or later to protect against potential data leaks and unauthorized access.
See every vulnerability recorded for apache-airflow →
FAQ
CVE-2026-45426 is a vulnerability in Apache Airflow that allows authenticated users to access logs of other DAGs due to an incorrect authorization mechanism.
Any deployment of Apache Airflow that relies on per-DAG log-access scoping, particularly in multi-team or shared-executor environments, is affected.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The CVSS score for this vulnerability is 3.1, indicating a low severity level.
While there are no specific workarounds, it is crucial to plan for an upgrade to the patched version as soon as possible to mitigate the risk.
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