High

DEBIAN-CVE-2026-56091

Type: advisorySource: OSV1 source record

When using Apache Shiro with the shiro-guice module in a web servlet context, a specially crafted HTTP request may cause an authentication bypass. This vulnerability is similar to https://www.cve.org/CVERecord?id=CVE-2020-1957 https://www.cve.org/CVERecord , except that it affects the `shiro-guice` module instead of the `shiro-spring` module. This issue affects all Apache Shiro versions through 2.x, and 3.0.0-alpha-1 only when using `shiro-guice` module in a web servlet context. Upgrade to version 3.0.0 or later, which fixes the issue.

Announced 25 Jun 2026Group revision 1

Original source ↗

DEBIAN-CVE-2026-56091

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-2026-56091

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-2026-56091.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-2026-56091.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-2026-56091.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Related CVEs: CVE-2026-56091
Source reference: /upstream

Publisher severity

high

Source reference: /severity/0/score

Event: #83595 · Revision 1
Added to Heist Feed: Mon, 26 Oct 2026 21:31:30 GMT
Publisher date: Thu, 25 Jun 2026 09:16:46 GMT

Read the original announcement

Revision history

26 Oct 2026DEBIAN-CVE-2026-56091 · Revision 1Source updated