CVE-2023-36543
Apache Airflow: ReDoS via dags function
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
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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
- Record
CVE-2023-36543- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-1333
- Updated
- 2026-11-02
CVE List No score
Apache Airflow: ReDoS via dags function
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
- Record
CVE-2023-36543- Weakness
- CWE-1333
- Updated
- 2026-11-02
EUVDEUVD-2023-0012
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
- Record
EUVD-2023-0012- CVSS
- 0.0 None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3h4m-m55v-gx4m
Apache Airflow Improper Input Validation vulnerability
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
- Record
GHSA-3h4m-m55v-gx4m- CVSS 4.0
- 7.1 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-20, CWE-1333
- Updated
- 2026-11-02
OSVGHSA-3h4m-m55v-gx4m
Apache Airflow Improper Input Validation vulnerability
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
- Record
GHSA-3h4m-m55v-gx4m- CVSS 4.0
- 7.1 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-1333, CWE-20
- Updated
- 2026-11-02
OSVBIT-airflow-2023-36543 No score
Apache Airflow: ReDoS via dags function
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
- Record
BIT-airflow-2023-36543- Updated
- 2026-11-02
OSV No score
Apache Airflow: ReDoS via dags function
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
- Record
CVE-2023-36543- Weakness
- CWE-1333
- Updated
- 2026-11-02
OSVPYSEC-2023-106 No score
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
- Record
PYSEC-2023-106- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
apache-airflowPyPI |
before 2.6.3 | 2.6.3 |
airflowBitnami |
before 2.6.3 | 2.6.3 |
apache-airflowPyPI |
before 2.6.3, plus listed versions 1.10.01.10.11.10.101.10.10rc11.10.10rc2 Show 45 moreShow less1.10.10rc31.10.10rc41.10.10rc51.10.111.10.11rc11.10.11rc21.10.121.10.12rc11.10.12rc21.10.12rc31.10.12rc41.10.131.10.13rc11.10.141.10.14rc11.10.14rc21.10.14rc31.10.14rc41.10.151.10.15rc11.10.1b11.10.1rc21.10.21.10.2b21.10.2rc11.10.2rc21.10.2rc31.10.31.10.3b11.10.3b21.10.3rc11.10.3rc21.10.41.10.4b21.10.4rc11.10.4rc21.10.4rc31.10.4rc41.10.4rc51.10.51.10.5rc11.10.61.10.6rc11.10.6rc21.10.7 |
2.6.3 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, facts | ||
| affected | ||
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-36543 is a medium vulnerability (CVSS 6.5) in Apache Airflow, published July 12, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.55%, the 75th percentile. Fixed in apache-airflow 2.6.3.
References
github.com/apache/airflow/pull/32060
lists.apache.org/thread/tokfs980504ylgk3cv3hjlnrtbv4tng4
nvd.nist.gov/vuln/detail/CVE-2023-36543
Left out here: 106 versions. The JSON record has them.