CVE-2026-49268 json
Apache Shiro: LDAP DN Injection in DefaultLdapRealm
published 2026-06-17 4 mo ago modified 2026-10-26 14 d ago also EUVD-2026-37701 , GHSA-x96m-rh44-vgv8
- cvss
- 9.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 43%
- public exploits
- 0
- none known
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 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.
Patch / fix
- maven org.apache.shiro:shiro-core 2.2.1, 3.0.0-alpha-2
- org.apache.shiro shiro-core 2.2.1, 3.0.0-alpha-2
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.8 | 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 |
| CNA | 4.0 | 8.8 | 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 |
| NVD | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.apache.shiro:shiro-core | <2.2.1 >=3.0.0-alpha-0, <3.0.0-alpha-2 |
2.2.1 3.0.0-alpha-2 |
Affected products
- Apache Software Foundation Apache Shiro
Classification
- Weakness
-
- CWE-90 Improper Neutralization of Special Elements used in an LDAP Query
References
-
lists.apache.org
/thread/svszql3od8td7hn6conyj2oq70v53b5s
vendor-advisory, web, mailing-list
-
openwall.com
/lists/oss-security/2026/06/17/8
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-49268
advisory
-
github.com
/apache/shiro
package
Sources
- CVE List CVE-2026-49268
- GitHub Advisory GHSA-x96m-rh44-vgv8
- NVD CVE-2026-49268
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.