CVE-2026-49268
CriticalCVSS 9.1Exploitation Probability (EPSS)
Low risk40th percentile — higher than 40% of all known CVEs
Summary
A remote attacker can inject LDAP special characters into the Distinguished Name (DN) construction in DefaultLdapRealm class. User-supplied username input is directly concatenated into the LDAP DN template without any escaping, allowing manipulation of the DN structure used for LDAP bind authentication.
Risk Assessment
An attacker may bypass authentication or impersonate other users, posing a significant security risk to the system.
Recommendation
It is recommended to upgrade to Apache Shiro version 2.2.1 or 3.0.0-alpha-2 or later to fix this vulnerability.
Original NVD description (English source)
A remote attacker can inject LDAP special characters into the Distinguished Name (DN) construction in DefaultLdapRealm class. User-supplied username input is directly concatenated into the LDAP DN template without any escaping of RFC 2253 special characters. This allows an attacker to manipulate the DN structure used for LDAP bind authentication, potentially bypassing authentication or impersonating other users. This issue affects all Apache Shiro versions through 2.2.0, and 3.0.0-alpha-1 when using DefaultLdapRealm Upgrade to Apache Shiro 2.2.1 or 3.0.0-alpha-2 or later, which fixes the issue.