CVE-2026-46745Network attack vector

Authentication bypass via unescaped LDAP username

Published May 25, 2026 · Updated May 25, 2026

LDAP filter injection in Apache Airflow FAB provider before 3.6.4 allows remote attackers to bypass authentication or read directory data. The _search_ldap method and nested-group lookup interpolate an unescaped username or user DN into LDAP filter strings, letting crafted metacharacters alter the query. Exploitation requires the FAB Auth Manager to use LDAP authentication; successful requests can expose directory entries or grant access as an LDAP user.

CVSS severity5.3
Medium
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

LDAP filter injection in Apache Airflow FAB provider before 3.6.4 allows remote attackers to bypass authentication or read directory data. The _search_ldap method and nested-group lookup interpolate an unescaped username or user DN into LDAP filter strings, letting crafted metacharacters alter the query. Exploitation requires the FAB Auth Manager to use LDAP authentication; successful requests can expose directory entries or grant access as an LDAP user.

The record

CVE
CVE-2026-46745
Published
May 25, 2026
Updated
May 25, 2026
Vendor
The Apache Software Foundation
Product
Apache Airflow FAB provider
Classifications
CWE-90, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 25, 2026CVE publishedPublication date reported by the CVE source.
  2. May 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.6.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Airflow FAB providerversion=0 <3.6.4

Published CVSS scores

5.3GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-90Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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