# CVE-2026-40459

## Summary

- **CVE ID:** CVE-2026-40459
- **Severity:** HIGH
- **CVSS Score:** 8.7 (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)
- **CWE:** CWE-90
- **Published:** Apr 17, 2026
- **Last Modified:** Apr 17, 2026

## 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

## Affected Products

- PAC4J — PAC4J (4.0)
- PAC4J — PAC4J (5.0)
- PAC4J — PAC4J (6.0)

## References

- [CNA](https://cert.pl/en/posts/2026/04/CVE-2026-40458/)
- [CNA](https://www.pac4j.org/blog/security-advisory-pac4j-core-and-ldap.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.61%
- **EPSS Percentile:** 47.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._