CVE-2026-49268: high-severity vulnerability in Apache Shiro
Apache Shiro: LDAP DN Injection in DefaultLdapRealm
Published
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.8epss 0.8%
from disclosure to weapon50 days
Published on NVDJun 17
1st PoC+50d
exploitation probability
0.8%top 46% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/S:P/AU:Y/R:A/RE:L/U:Red
Affected products
Apache Software Foundation · Apache Shiropublic PoCs found — 1
githubgithub.com/xiaoqiMikko/shiro-check★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Apache Shiro
In the same product, most dangerous first.
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