Critical

DEBIAN-CVE-2026-49268

Type: advisorySource: OSV1 source record

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.

Announced 17 Jun 2026Group revision 1

Original source ↗

DEBIAN-CVE-2026-49268

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-49268

shiro

Source reference: /affected/0/package/name

Affected versions: 1.3.2-5
Source reference: /affected/0/versions
1.3.2-6
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

shiro

Source reference: /affected/1/package/name

Affected versions: 1.3.2-6
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

shiro

Source reference: /affected/2/package/name

Affected versions: 1.3.2-6
Source reference: /affected/2/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "shiro",
      "purl": "pkg:deb/debian/shiro?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "1.3.2-5",
      "1.3.2-6"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-49268.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "shiro",
      "purl": "pkg:deb/debian/shiro?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "1.3.2-6"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-49268.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "shiro",
      "purl": "pkg:deb/debian/shiro?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "1.3.2-6"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-49268.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Related CVEs: CVE-2026-49268
Source reference: /upstream

Publisher severity

critical

Source reference: /severity/0/score

Event: #83591 · Revision 1
Added to Heist Feed: Mon, 26 Oct 2026 21:31:24 GMT
Publisher date: Wed, 17 Jun 2026 14:17:56 GMT

Read the original announcement

Revision history

26 Oct 2026DEBIAN-CVE-2026-49268 · Revision 1Source updated