CVE-2026-40459 | PAC4J up to 4.5.9/5.7.9/6.4.0 LDAP Search ldap injection

VDB-358078 · CVE-2026-40459 · GCVE-0-2026-40459 PAC4J UP TO 4.5.9/5.7.9/6.4.0 LDAP SEARCH LDAP INJECTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.0 $0-$5k 5.05+ Summaryinfo A vulnerability classified as critical was found in PAC4J up to 4.5.9/5.7.9/6.4.0. The affected element is an unknown function of the component LDAP Handler. Executing a manipulation of the argument Search can lead to ldap injection. This vulnerability appears as CVE-2026-40459. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is advised. Detailsinfo A vulnerability has been found in PAC4J up to 4.5.9/5.7.9/6.4.0 and classified as critical. This vulnerability affects an unknown function of the component LDAP Handler. The manipulation of the argument search with an unknown input leads to a ldap injection vulnerability. The CWE definition for the vulnerability is CWE-90. The product constructs all or part of an LDAP query using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended LDAP query when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes: 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 The weakness was presented by Bartłomiej Dmitruk. The advisory is available at cert.pl. This vulnerability was named CVE-2026-40459 since 04/13/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1505 by the MITRE ATT&CK project. Upgrading to version 4.5.10, 5.7.10 or 6.4.1 eliminates this vulnerability. Productinfo Name PAC4J Version 4.5.0 4.5.1 4.5.2 4.5.3 4.5.4 4.5.5 4.5.6 4.5.7 4.5.8 4.5.9 5.7.0 5.7.1 5.7.2 5.7.3 5.7.4 5.7.5 5.7.6 5.7.7 5.7.8 5.7.9 6.0 6.1 6.2 6.3 6.4.0 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 6.3 VulDB Meta Temp Score: 6.0 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Ldap injection CWE: CWE-90 / CWE-74 / CWE-707 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: PAC4J 4.5.10/5.7.10/6.4.1 Timelineinfo 04/13/2026 CVE reserved 04/17/2026 +4 days Advisory disclosed 04/17/2026 +0 days VulDB entry created 04/17/2026 +0 days VulDB entry last update Sourcesinfo Advisory: cert.pl Researcher: Bartłomiej Dmitruk Status: Confirmed CVE: CVE-2026-40459 (🔒) GCVE (CVE): GCVE-0-2026-40459 GCVE (VulDB): GCVE-100-358078 Entryinfo Created: 04/17/2026 17:02 Changes: 04/17/2026 17:02 (67) Complete: 🔍 Cache ID: 99:C33:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸