What is the CVSS score of EUVD-2026-31669?

EUVD-2026-31669 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 0.2%.

Is there a patch available for EUVD-2026-31669?

Yes, a patch is available for EUVD-2026-31669. Update the affected software to the latest version immediately.

Apache Airflow FAB EUVD-2026-31669

| CVE-2026-46745 MEDIUM

LDAP Injection (CWE-90)

2026-05-25 apache

GHSA-g283-w6fp-c4fc

Authentication Bypass LDAP Apache Code Injection Apache Airflow Fab Provider

5.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.3 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Lifecycle Timeline

Source Code Evidence Fetched

Jun 08, 2026 - 12:14 vuln.today

Analysis Generated

Jun 08, 2026 - 12:14 vuln.today

CVSS changed

May 26, 2026 - 21:22 NVD

5.3 (MEDIUM)

CVE Published

May 25, 2026 - 10:41 nvd

UNKNOWN (no severity yet)

CVE Published

May 25, 2026 - 10:41 nvd

MEDIUM 5.3

DescriptionCVE.org

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.

AnalysisAI

LDAP filter injection in Apache Airflow FAB Auth Manager (apache-airflow-providers-fab < 3.6.4) enables unauthenticated remote attackers to manipulate LDAP query logic by embedding special characters in login credentials, resulting in directory data exfiltration or authentication bypass. The vulnerability is confirmed by source code evidence: the _search_ldap and _ldap_get_nested_groups methods in override.py directly interpolated user-supplied input into LDAP filter strings without sanitization. No public exploit code has been identified at time of analysis and CISA KEV does not list this CVE, but the SSVC framework marks it as automatable, meaning exploitation can be scripted at scale against exposed Airflow instances using LDAP auth.

Technical ContextAI

Apache Airflow FAB Auth Manager is the Flask App Builder (FAB)-based authentication subsystem for Apache Airflow, responsible for handling LDAP, OAuth, and other authentication backends. The root cause is CWE-90 (Improper Neutralization of Special Elements used in an LDAP Query). In override.py, the _search_ldap method constructed LDAP filter strings by directly interpolating the username variable - e.g., f'({self.auth_ldap_uid_field}={username})' - without escaping LDAP metacharacters such as *, (, ), \, and \0. The same flaw existed in _ldap_get_nested_groups, where user_dn was similarly unescaped. The fix, confirmed in GitHub PR #66417, applies ldap.filter.escape_filter_chars() to both username and user_dn before filter construction. Affected CPE: cpe:2.3:a:apache_software_foundation:apache_airflow_fab_provider:*:*:*:*:*:*:*:* for all versions prior to 3.6.4.

RemediationAI

Upgrade apache-airflow-providers-fab to version 3.6.4 or later; this is the vendor-confirmed fix per the Apache security advisory at https://lists.apache.org/thread/dvfy0bs181xwsrjrd3y5c55ztbzm8yhh and the upstream patch in GitHub PR #66417 (https://github.com/apache/airflow/pull/66417). If immediate upgrade is not possible, the vendor explicitly recommends disabling LDAP authentication as a compensating control until the provider can be updated - note this will force migration to an alternative auth backend (OAuth, password-based, etc.) which may impact operational workflows. There is no known partial mitigation that preserves LDAP functionality while blocking injection; network-layer filtering of LDAP metacharacters at a WAF or reverse proxy is unreliable and not recommended as a substitute for patching. Review the oss-security disclosure at http://www.openwall.com/lists/oss-security/2026/05/24/10 for additional context.