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

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-07-12 · updated 2026-06-17
Weakness: CWE-1333

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

Affected products

Apache Airflow: before 2.6.3 — fixed in 2.6.3

How to fix

Upgrade to a fixed version: Apache Airflow 2.6.3. Check the vendor advisory for mitigations.

References

https://github.com/apache/airflow/pull/32060
https://lists.apache.org/thread/tokfs980504ylgk3cv3hjlnrtbv4tng4
https://github.com/apache/airflow/pull/32060
https://lists.apache.org/thread/tokfs980504ylgk3cv3hjlnrtbv4tng4

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