High severity8.8NVD Advisory· Published Apr 17, 2026· Updated Apr 20, 2026
CVE-2026-40459
CVE-2026-40459
Description
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
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Patches
Vulnerability mechanics
References
2- cert.pl/en/posts/2026/04/CVE-2026-40458/nvdThird Party Advisory
- www.pac4j.org/blog/security-advisory-pac4j-core-and-ldap.htmlnvdVendor Advisory
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