CVE catalog
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 tem
- Severity
- High · CVSS 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 - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.51% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | shiro | sid | 1.3.2-6 | vulnerable |
| Debian | shiro | forky | 1.3.2-6 | vulnerable |
| Debian | shiro | trixie | 1.3.2-6 | vulnerable |
| Debian | shiro | bookworm | 1.3.2-5 | vulnerable |
| Cpe | shiro | Not reported | Not reported | vulnerable |
| Cpe | shiro | Not reported | 2.2.1 | fixed |
| Cpe | shiro | Not reported | Not reported | unknown |
| Cpe | shiro | Not reported | Not reported | unknown |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | shiro | source | sid | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | shiro | source | forky | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | shiro | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | shiro | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Cpe | shiro | cpe | Not reported | 2.2.1 | Not reported | Not reported | Not reported |
Notes
[trixie] shiro: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libshiro-java]Affected
Source package: [shiro]
Details (2)
1.3.2-5· all · bookwormAffected
nvd · shiro · debian · bookworm; nvd · shiro · debian · 12
1.3.2-5· all · bookwormAffected
nvd · shiro · debian · bookworm; nvd · shiro · debian · 12
[Debian 13 (Trixie)]
- [libshiro-java]Affected
Source package: [shiro]
Details (2)
1.3.2-6· all · trixieAffected
nvd · shiro · debian · 13
1.3.2-6· all · trixieAffected
nvd · shiro · debian · 13
Observed:
References
- [http://www.openwall.com/lists/oss-security/2026/06/17/8]
- [https://lists.apache.org/thread/svszql3od8td7hn6conyj2oq70v53b5s]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-49268]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-49268]
- [https://security-tracker.debian.org/tracker/CVE-2026-49268]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]