High severityNVD Advisory· Published Jun 17, 2026· Updated Jun 17, 2026
Apache Shiro: LDAP DN Injection in DefaultLdapRealm
CVE-2026-49268
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.apache.shiro:shiro-coreMaven | < 2.2.1 | 2.2.1 |
org.apache.shiro:shiro-coreMaven | >= 3.0.0-alpha-0, < 3.0.0-alpha-2 | 3.0.0-alpha-2 |
Affected products
8- osv-coords7 versionspkg:apk/chainguard/apache-activemq-6.2pkg:apk/chainguard/apache-activemq-fips-6.2pkg:apk/chainguard/apache-jena-fusekipkg:apk/chainguard/neo4j-2026.05pkg:apk/chainguard/neo4j-5.26pkg:apk/wolfi/neo4j-2026.05pkg:apk/wolfi/neo4j-5.26
< 6.2.7-r3+ 6 more
- (no CPE)range: < 6.2.7-r3
- (no CPE)range: < 6.2.6-r6
- (no CPE)range: < 6.1.0-r3
- (no CPE)range: < 2026.05.0-r2
- (no CPE)range: < 5.26.27-r2
- (no CPE)range: < 2026.05.0-r2
- (no CPE)range: < 5.26.27-r2
Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-x96m-rh44-vgv8ghsaADVISORY
- lists.apache.org/thread/svszql3od8td7hn6conyj2oq70v53b5sghsavendor-advisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-49268ghsaADVISORY
- www.openwall.com/lists/oss-security/2026/06/17/8ghsaWEB
News mentions
1- Apache: Seven CVEs Across Shiro, DolphinScheduler, and Airflow Disclosed June 17Vypr Intelligence · Jun 17, 2026