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TI-2023-18381 Aliases CVE-2023-36543GHSA-3h4m-m55v-gx4m

Apache Airflow: ReDoS via dags function

Priority LOW 32CWE-1333Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-1333.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01555 75th percentileScored 2026-11-07
Fix Fixed Apache Airflow (Apache Software Foundation): 2.6.3apache-airflow (PyPI): 2.6.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Airflowbefore 2.6.32.6.3Patch availableCNA
—apache-airflow (PyPI)before 2.6.32.6.3Patch availableGHSA-3h4m-m55v-gx4m
  • Apache Airflow VendorApache Affected before 2.6.3 Fixed in 2.6.3 Patch available CNA
  • apache-airflow (PyPI) Vendor— Affected before 2.6.3 Fixed in 2.6.3 Patch available GHSA-3h4m-m55v-gx4m

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*before 2.6.3VulnerableApache
  • cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:* Versions before 2.6.3 Vulnerable ·Apache

Remediation

  • Fix · CNA Apache Airflow (Apache Software Foundation) Fixed in 2.6.3
  • Fix · GHSA-3h4m-m55v-gx4m apache-airflow (PyPI) Fixed in 2.6.3 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apache Airflow 2.6.3

    5 records Highest priority Priority LOW 5 LOW

    Other records, highest priority first

    • TI-2023-09031 Apache Airflow: Scheduler remote DoSPriority LOW 32
    • TI-2023-09030 Apache Airflow path traversal by authenticated userPriority LOW 32
    • TI-2023-17973 Apache Airflow: Access to DAGs without relevant permissionPriority LOW 31
    Show all 5 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-36543
  2. 2026-10-03 Alias added: GHSA-3h4m-m55v-gx4m

References

Patch 2

Advisory 1

Other 3

  • TI-2020-10905 Missing authentication in Apache Airflow KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-09638 OS command injection in Apache Airflow KEVCVSS 3.1HIGH 8.8
  • TI-2022-19017 Apache Airflow <2.4.0 has an RCE in a bash example CVSS 3.1HIGH 8.8
  • TI-2021-16140 Apache Airflow: Variable Import endpoint missed authentication check CVSS 3.1CRITICAL 9.8
  • TI-2022-08169 Apache Airflow: RCE in example DAGs CVSS 3.1HIGH 8.8
  • TI-2024-26776 Apache Airflow: DAG Author Code Execution possibility in airflow-scheduler CVSS 3.1HIGH 8.8
See all 157 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences