What is CVE-2026-40459?

CVE-2026-40459 is a high-severity vulnerability in Pac4j, classified under LDAP Injection. CVSS score: 8.8/10. Published 2026-04-17.

How severe is CVE-2026-40459?

High severity. CVSS v3 base score is 8.8 out of 10.

LDAP Injection in Pac4j

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 operatio…

EPSS: 0.006 (45.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Pac4j — versions 4.0, 5.0, 6.0

Weakness classification (CWE)

CWE-90 — LDAP Injection

References

cvd@cert.pl (Third Party Advisory, third-party-advisory)
cvd@cert.pl (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-40459?: CVE-2026-40459 is a high-severity vulnerability in Pac4j, classified under LDAP Injection. CVSS score: 8.8/10. Published 2026-04-17.
How severe is CVE-2026-40459?: High severity. CVSS v3 base score is 8.8 out of 10.