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CVE-2026-49268

Apache Shiro: LDAP DN Injection in DefaultLdapRealm

Published: Jun 17, 2026Updated: Jun 18, 2026 Sources: CVE List NVDCWE-90
NVD MITRE
9.1CVSSCRITICAL
EPSS Score
0.5%
Top 61.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-90

Affected Products

Apache ShiroApache Software Foundation
Mixed
Web & CMS Plugins / cms-core
shiroapache
LibraryLibrary
OSS Libraries / generic-library
apache software foundationoss-projectUSWeb & CMS Pluginsaka apache foundation
apacheoss-projectUSWeb & CMS Pluginsaka apache http server, apache httpd

Exploitability

Official Patch Available

References

https://lists.apache.org/thread/svszql3od8td7hn6conyj2oq70v53b5s
lists.apache.org
http://www.openwall.com/lists/oss-security/2026/06/17/8
openwall.com

Timeline

Published
Jun 17, 2026
Last Updated
Jun 18, 2026
News mentions
1

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