CVE-2026-23903

{
  "id": "CVE-2026-23903",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-23903",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-02-09T16:17:20.608697Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@apache.org",
      "affectedData": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache Shiro",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "2.0.7",
              "versionType": "semver"
            }
          ],
          "packageName": "org.apache.shiro:shiro-web",
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-02-09T10:15:57.520",
  "references": [
    {
      "url": "https://lists.apache.org/thread/5jjf0hnjcol58z2m5y255c7scz1lnp8k",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "source": "security@apache.org"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/02/08/1",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@apache.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-289"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Authentication Bypass by Alternate Name vulnerability in Apache Shiro.\n\nThis issue affects Apache Shiro: before 2.0.7.\n\nUsers are recommended to upgrade to version 2.0.7, which fixes the issue.\n\nThe issue only effects static files. If static files are served from a case-insensitive filesystem,\nsuch as default macOS setup, static files may be accessed by varying the case of the filename in the request.\nIf only lower-case (common default) filters are present in Shiro, they may be bypassed this way.\n\nShiro 2.1.0 and later has a new parameters to remediate this issue\nshiro.ini: filterChainResolver.caseInsensitive = true\napplication.properties: shiro.caseInsensitive=true\n\nShiro 3.0.0 and later makes this the default in shiro.ini-based configurations.\nShiro 3.0.1 and later makes this the default in all configurations, including programmatic and Spring / Spring Boot."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de omisión de autenticación por nombre alternativo en Apache Shiro.\n\nEste problema afecta a Apache Shiro: antes de la versión 2.0.7.\n\nSe recomienda a los usuarios actualizar a la versión 2.0.7, que soluciona el problema.\n\nEl problema solo afecta a los archivos estáticos. Si los archivos estáticos se sirven desde un sistema de archivos que no distingue entre mayúsculas y minúsculas, como la configuración predeterminada de macOS, se puede acceder a los archivos estáticos variando el uso de mayúsculas y minúsculas del nombre de archivo en la solicitud. Si solo hay filtros en minúsculas (valor predeterminado común) en Shiro, pueden ser omitidos de esta manera.\n\nShiro 2.0.7 y versiones posteriores tienen nuevos parámetros para solucionar este problema\nshiro.ini: filterChainResolver.caseInsensitive = true\napplication.propertie: shiro.caseInsensitive=true\n\nShiro 3.0.0 y versiones posteriores (próximas) lo convierten en el valor predeterminado."
    }
  ],
  "lastModified": "2026-08-20T10:16:41.287",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:apache:shiro:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9E1B2B45-F100-4693-9F70-FE8D342853A3",
              "versionEndExcluding": "2.0.7"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@apache.org"
}