CVE-2026-40459 PUBLISHED

LDAP Injection in PAC4J

Assigner: CERT-PL
Reserved: 13.04.2026 Published: 17.04.2026 Updated: 17.04.2026

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

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	PAC4J
Product	PAC4J
Versions	Default: unaffected affected from 4.0 to 4.5.10 (excl.) affected from 5.0 to 5.7.10 (excl.) affected from 6.0 to 6.4.1 (excl.)

Credits

Bartłomiej Dmitruk, striga.ai finder

References

Problem Types

CWE-90: Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') CWE

Impacts

CAPEC-136: LDAP Injection