CVE•Published 2026-06-17•Modified 2026-06-18•1 article on news•6 live references•NVD data

CVE-2026-49268Apache · Shiro

Vulnerability data via NVD (ingested)

CVSS v3.1

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS percentile

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Weaknesses (CWE)

CWE-90Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')

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.

Timeline

Published 2026-06-17

Modified 2026-06-18

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-49268

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Apache Shiro"

All exposed Apache Shiro instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Shiro"

HTTP body or banner mentions "Shiro" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-49268