CVE-2026-49268
Apache Shiro: LDAP DN Injection in DefaultLdapRealm
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Apache Shiro: LDAP DN Injection in DefaultLdapRealm
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.
- Record
CVE-2026-49268- CVSS 4.0
- 8.8 High
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 - Weakness
- CWE-90
- Updated
- 2026-11-02
EUVDEUVD-2026-37701
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.
- Record
EUVD-2026-37701- CVSS 4.0
- 8.8 High
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-x96m-rh44-vgv8
Apache Shiro: LDAP DN Injection in DefaultLdapRealm
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.
- Record
GHSA-x96m-rh44-vgv8- CVSS 4.0
- 8.8 High
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 - Weakness
- CWE-90
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-49268- CVSS 4.0
- 8.8 High
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 - CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-90
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-49268
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.
- Record
DEBIAN-CVE-2026-49268- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
OSVGHSA-x96m-rh44-vgv8
Apache Shiro: LDAP DN Injection in DefaultLdapRealm
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.
- Record
GHSA-x96m-rh44-vgv8- CVSS 4.0
- 8.8 High
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 - Weakness
- CWE-90
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-49268
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.
- Record
UBUNTU-CVE-2026-49268- CVSS 4.0
- 8.8 High
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 - CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.apache.shiro:shiro-coreMaven |
before 2.2.1 | 2.2.1 |
org.apache.shiro:shiro-coreMaven |
3.0.0-alpha-0 up to 3.0.0-alpha-2 | 3.0.0-alpha-2 |
shiroDebian:12 |
All versions, plus listed versions 1.3.2-51.3.2-6 |
None known |
shiroDebian:13 |
All versions, plus listed versions 1.3.2-6 |
None known |
shiroDebian:14 |
All versions, plus listed versions 1.3.2-6 |
None known |
org.apache.shiro:shiro-coreMaven |
before 2.2.1, plus listed versions 1.0.0-incubating1.1.01.10.01.10.11.11.0 Show 39 moreShow less1.12.01.13.01.2.01.2.11.2.21.2.31.2.41.2.51.2.61.3.01.3.11.3.21.4.01.4.0-RC21.4.11.4.21.5.01.5.11.5.21.5.31.6.01.7.01.7.11.8.01.9.01.9.12.0.02.0.0-alpha-12.0.0-alpha-22.0.0-alpha-32.0.0-alpha-42.0.12.0.22.0.32.0.42.0.52.0.62.1.02.2.0 |
2.2.1 |
org.apache.shiro:shiro-coreMaven |
3.0.0-alpha-0 up to 3.0.0-alpha-2, plus listed versions 3.0.0-alpha-1 |
3.0.0-alpha-2 |
shiroUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 1.2.4-11.2.4-1ubuntu0.1~esm11.2.4-1ubuntu0.1~esm2 |
None known |
shiroUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 1.3.2-21.3.2-3~18.041.3.2-3~18.04.11.3.2-3ubuntu0.18.04.1~esm1 |
None known |
shiroUbuntu:20.04:LTS |
All versions, plus listed versions 1.3.2-41.3.2-4ubuntu0.11.3.2-4ubuntu0.2 |
None known |
Show 5 moreShow less
| Package | Affected | Fixed |
|---|---|---|
shiroUbuntu:22.04:LTS |
All versions, plus listed versions 1.3.2-41.3.2-5 |
None known |
shiroUbuntu:Pro:24.04:LTS |
All versions, plus listed versions 1.3.2-51.3.2-5ubuntu0.24.04.1~esm1 |
None known |
shiroUbuntu:25.10 |
All versions, plus listed versions 1.3.2-6ubuntu1 |
None known |
shiroUbuntu:26.10 |
All versions, plus listed versions 1.3.2-6ubuntu2 |
None known |
shiroUbuntu:26.04:LTS |
All versions, plus listed versions 1.3.2-6ubuntu11.3.2-6ubuntu2 |
None known |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | sassoftware/shiro | 2026-08-31 |
| PoC in GitHub | xiaoqiMikko/shiro-check | 2026-08-06 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-49268 is a high vulnerability (CVSS 8.8) in Apache Shiro, published June 17, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.51%, the 43rd percentile. Fixed in org.apache.shiro:shiro-core 2.2.1.
References
lists.apache.org/thread/svszql3od8td7hn6conyj2oq70v53b5s
openwall.com/lists/oss-security/2026/06/17/8
nvd.nist.gov/vuln/detail/CVE-2026-49268
github.com/advisories/GHSA-x96m-rh44-vgv8
security-tracker.debian.org/tracker/CVE-2026-49268
ubuntu.com/security/CVE-2026-49268
cve.org/CVERecord?id=CVE-2026-49268