CVE-2026-40459

8.7 highEPSS 0.6%

High (8.7) in pac4j pac4j. EPSS 0.6% chance of exploitation in the next 30 days.

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

Severity

CVSS 4.0

8.7 high

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 3.1

8.8 high

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 49% of CVEs (scores of 2026-10-31)
CWE: CWE-90
Published: 2026-04-17
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

pac4j:pac4j

References

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

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