{
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09"
      },
      "title": "Authentication bypass in Guice-Web integration",
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-289 Authentication Bypass by Alternate Name",
              "lang": "en",
              "cweId": "CWE-289",
              "type": "CWE"
            }
          ]
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "affected": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache Shiro",
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "packageName": "org.apache.shiro:shiro-guice",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThanOrEqual": "2.99.99",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "3.0.0-alpha-0",
              "lessThanOrEqual": "3.0.0-alpha-1",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "descriptions": [
        {
          "value": "When using Apache Shiro with the shiro-guice module in a web servlet context, a specially crafted HTTP request may cause an authentication bypass.\nThis 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.\n\nThis 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.\n\nUpgrade to version 3.0.0 or later, which fixes the issue.",
          "lang": "en",
          "supportingMedia": [
            {
              "type": "text/html",
              "base64": false,
              "value": "When using Apache Shiro with the shiro-guice module in a web servlet context, a specially crafted HTTP request may cause an authentication bypass.<br>This vulnerability is similar to <a target=\"_blank\" rel=\"nofollow\" href=\"https://www.cve.org/CVERecord?id=CVE-2020-1957[CVE-2020-1957\">https://www.cve.org/CVERecord?id=CVE-2020-1957</a>, except that it affects the `shiro-guice` module instead of the `shiro-spring` module.<br><br>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.<br><br>Upgrade to version 3.0.0 or later, which fixes the issue.<br>"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://lists.apache.org/thread/onmtxmy2qonbpx7xlw3o34x8sctv47r7",
          "tags": [
            "vendor-advisory"
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ],
          "cvssV4_0": {
            "version": "4.0",
            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "privilegesRequired": "NONE",
            "userInteraction": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "subConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "vulnAvailabilityImpact": "NONE",
            "subAvailabilityImpact": "NONE",
            "Safety": "PRESENT",
            "Automatable": "YES",
            "Recovery": "NOT_DEFINED",
            "valueDensity": "DIFFUSE",
            "vulnerabilityResponseEffort": "LOW",
            "providerUrgency": "AMBER",
            "baseSeverity": "HIGH",
            "baseScore": 8.2,
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/S:P/AU:Y/V:D/RE:L/U:Amber"
          }
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "LocalHost <localhost.detect@gmail.com>",
          "type": "finder"
        },
        {
          "lang": "en",
          "value": "Lenny Primak <lenny@flowlogix.com>",
          "type": "remediation developer"
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "cveId": "CVE-2026-56091",
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "serial": 1,
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}