CVE-2023-36543 Apache Airflow: ReDoS via dags function

What is CVE-2023-36543?

CVE-2023-36543 is a medium-severity denial of service vulnerability in Apache Airflow, published on 12 Jul 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Apache Airflow, versions before 2.6.3, has a vulnerability where an authenticated user can use crafted input to make the current request hang. It is recommended to upgrade to a version that is not affected

Weakness: CWE-1333

Which versions are affected by CVE-2023-36543?

4 open source packages ship an affected version, including apache-airflow and airflow. It affects 1 product.

Products include Apache Airflow.

How do I fix CVE-2023-36543?

Upgrade apache-airflow to 2.6.3 or later.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2023-36543 being exploited?

There is no known exploitation of CVE-2023-36543 in the wild and no public exploit code.

Other vulnerabilities in Apache Airflow

• CVE-2020-13927 Apache Airflow's Experimental API Authentication Bypass Exploited Critical 9.8
• CVE-2020-11978 Apache Airflow Command Injection Exploited High 8.8
• CVE-2026-33264 Apache Airflow: DAG author RCE on webserver via unrestricted import_string() in BaseSerialization.deserialize() Critical 9.8
• CVE-2023-25754 Apache Airflow: Privilege escalation using airflow logs Critical 9.8
• CVE-2023-22884 Apache Airflow, Apache Airflow MySQL Provider: Arbitrary file read via MySQL provider in Apache Airflow Critical 9.8

All Apache Airflow vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-airflow-2023-36543, GHSA-3h4m-m55v-gx4m, PYSEC-2023-106.