CVE-2026-40459

PAC4J is vulnerable to LDAP Injection in multiple methods. A low-privileged remote attacker can inject crafted LDAP syntax into ID-based search parameters, potentially resulting in unauthorized LDAP queries and arbitrary directory operations. This issue was fixed in PAC4J versions 4.5.10, 5.7.10 and 6.4.1

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://cert.pl/en/posts/2026/04/CVE-2026-40458/	Third Party Advisory
https://www.pac4j.org/blog/security-advisory-pac4j-core-and-ldap.html	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:pac4j:pac4j::::::::
	cpe:2.3:a:pac4j:pac4j::::::::
	cpe:2.3:a:pac4j:pac4j::::::::

History

20 Apr 2026, 14:38

Type	Values Removed	Values Added
CPE		cpe:2.3:a:pac4j:pac4j::::::::
First Time		Pac4j Pac4j pac4j
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 8.8
References	~~() https://cert.pl/en/posts/2026/04/CVE-2026-40458/ -~~	() https://cert.pl/en/posts/2026/04/CVE-2026-40458/ - Third Party Advisory
References	~~() https://www.pac4j.org/blog/security-advisory-pac4j-core-and-ldap.html -~~	() https://www.pac4j.org/blog/security-advisory-pac4j-core-and-ldap.html - Vendor Advisory

17 Apr 2026, 14:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-17 14:16

Updated : 2026-04-20 14:38

NVD link : CVE-2026-40459

Mitre link : CVE-2026-40459

CVE.ORG link : CVE-2026-40459

JSON object : View

Products Affected

pac4j

pac4j

CWE

CWE-90

Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')

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