HOMEVULNERABILITIESCVE-2026-49268
CRITICAL

CVE-2026-49268

CWE-90Published: June 17, 2026· Updated: Jun 18, 2026

9.1
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2026-49268 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 9.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected Vendors & Products

Apache1 product
shiro
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://lists.apache.org/thread/svszql3od8td7hn6conyj2oq70v53b5s
ADVISORYhttp://www.openwall.com/lists/oss-security/2026/06/17/8

All References (2)

→
https://lists.apache.org/thread/svszql3od8td7hn6conyj2oq70v53b5sMailing List · Vendor Advisory
→
http://www.openwall.com/lists/oss-security/2026/06/17/8Third Party Advisory

Quick Facts

CVE IDCVE-2026-49268
CVSS Score9.1 / 10
SeverityCRITICAL
WeaknessCWE-90
CISA KEVNo
Affected1 vendor
PublishedJun 17, 2026

Related CVEs (CWE-90)

CVE-2026-44930
9.8
CVE-2026-33289
9.8
CVE-2026-41919
9.1
CVE-2026-39962
8.8
CVE-2026-31828
8.8
CVE-2026-40459
8.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-49268 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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