Home/CVE/PAC4J is vulnerable to LDAP Injection in multiple methods. A low-privileged remote attacker can inject crafted LDAP synt
CVE

CVE-2026-40459

PAC4J is vulnerable to LDAP Injection in multiple methods. A low-privileged remote attacker can inject crafted LDAP synt

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.

HIGH · CVSS 8.8 EPSS 0.00057
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-90Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
▤

Affected Products & Versions

3
pac4j>= 4.0.0 and < 4.5.10
pac4j>= 5.0.0 and < 5.7.10
pac4j>= 6.0.0 and < 6.4.1
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.1 · cvd@cert.pl
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD17 Apr 2026 · 02:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://cert.pl/en/posts/2026/04/CVE-2026-40458/Third Party Advisory
https://www.pac4j.org/blog/security-advisory-pac4j-core-and-ldap.htmlVendor Advisory
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