Unauthorized directory operations via unescaped LDAP identifiers
Published Apr 17, 2026 · Updated Apr 17, 2026
LDAP injection in pac4j-ldap allows remote authenticated users to execute unauthorized LDAP queries through crafted account IDs. LdapProfileService concatenates unescaped ID values into distinguished names used by insert and delete operations and directly joins values into search filters. Low-privileged access to an application path that forwards an attacker-controlled ID is required; successful requests permit unauthorized searches and arbitrary directory operations.
Summary
What happened
LDAP injection in pac4j-ldap allows remote authenticated users to execute unauthorized LDAP queries through crafted account IDs. LdapProfileService concatenates unescaped ID values into distinguished names used by insert and delete operations and directly joins values into search filters. Low-privileged access to an application path that forwards an attacker-controlled ID is required; successful requests permit unauthorized searches and arbitrary directory operations.
The record
- CVE
- CVE-2026-40459
- Published
- Apr 17, 2026
- Updated
- Apr 17, 2026
- Vendor
- pac4j
- Product
- pac4j
- Classifications
- CWE-90, CAPEC-136
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 17, 2026CVE publishedPublication date reported by the CVE source.
- Apr 17, 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?
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- Affected versionversion=4.0 <4.5.10
- Affected versionversion=5.0 <5.7.10
- Affected versionversion=6.0 <6.4.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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