Is CVE-2026-40459 actively exploited?

No active exploitation of CVE-2026-40459 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40459 be exploited remotely?

Yes. CVE-2026-40459 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-40459?

CVE-2026-40459 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2026-40459

CWE-90Published: April 17, 2026· Updated: Apr 20, 2026

8.8

CVSS v3.1

EPSS:0.13%probability of exploitation in 30 daysPercentile:31.7th

Official 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

NVD Source

Technical Analysis

CVE-2026-40459 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.