---
cve: "CVE-2026-40459"
severity: "HIGH"
cvss: 8.7
epss: "61%"
vendor: "pac4j"
kev: false
exploited: false
published: "2026-04-17 14:16:34"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T00:55:33+02:00"
---

# CVE-2026-40459

> 8.7 HIGH

## Beschreibung

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

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 773ecd47b45a9e23c0ec72a3a7acc2588324edb2 (Commit)
- 735e3e573dfa90e0361cc0ca66274cacd0d6788f (Commit)

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-40459) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_