Apache Airflow FAB provider up to 3.6.3 ldap injection

Summaryinfo

A vulnerability was found in Apache Airflow FAB provider up to 3.6.3. It has been rated as critical. Impacted is an unknown function. This manipulation causes ldap injection. This vulnerability is handled as CVE-2026-46745. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Apache Airflow FAB provider up to 3.6.3. Affected by this vulnerability is an unknown function. The manipulation with an unknown input leads to a ldap injection vulnerability. The CWE definition for the vulnerability is CWE-90. The product constructs all or part of an LDAP query using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended LDAP query when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Apache Airflow FAB Auth Manager contains an LDAP filter injection vulnerability (CWE-90) that allows unauthenticated attackers to exfiltrate directory data or bypass authentication. Upgrade to apache-airflow-providers-fab 3.6.4 or later. If immediate upgrade is not possible, disable LDAP authentication until the provider can be updated.

The weakness was released by Venkatraman Kumar. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-46745 since 05/18/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/25/2026). The attack technique deployed by this issue is T1505 according to MITRE ATT&CK.

Upgrading to version 3.6.4 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-31669). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Business Process Management Software

Vendor

• Apache

Name

• Airflow FAB provider

Version

• 3.6.0
• 3.6.1
• 3.6.2
• 3.6.3

License

• open-source

Website

• Vendor: https://www.apache.org/

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