CVE-2026-49268
HIGH EPSS 38.7%
Published Jun 17, 20261w ago · Modified Jun 18, 20261w ago
8.8 CVSS 4.0
Published Jun 17, 2026 1w ago
Last Modified Jun 18, 2026 1w ago
Description
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:A/V:X/RE:L/U:Red Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope P
Threat Intelligence
EPSS Exploit Probability
38.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-90
Affected Products 2
References 2
- openwall.com http://www.openwall.com/lists/oss-security/2026/06/17/8
- lists.apache.org https://lists.apache.org/thread/svszql3od8td7hn6conyj2oq70v53b5s
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.