cve-2026-55957

{
  "cvss": 7.3,
  "datePublished": "2026-06-29T21:16:45.700",
  "dateUpdated": "2026-10-25T21:10:00.770",
  "description": "Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1 through 10.1.36, from 9.0.0.M1 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.\n\nUsers are recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, which fixes the issue.",
  "id": "CVE-2026-55957",
  "raw": {
    "affected": [
      {
        "affectedData": [
          {
            "defaultStatus": "unaffected",
            "product": "Apache Tomcat",
            "vendor": "Apache Software Foundation",
            "versions": [
              {
                "lessThanOrEqual": "11.0.4",
                "status": "affected",
                "version": "11.0.0-M1",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "10.1.36",
                "status": "affected",
                "version": "10.1.0-M1",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "9.0.100",
                "status": "affected",
                "version": "9.0.0.M1",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "8.5.100",
                "status": "affected",
                "version": "8.5.0",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "7.0.109",
                "status": "affected",
                "version": "7.0.0",
                "versionType": "semver"
              },
              {
                "lessThan": "7.0.0",
                "status": "unknown",
                "version": "0",
                "versionType": "semver"
              }
            ]
          }
        ],
        "source": "security@apache.org"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "BE6699B4-1EA4-43C1-A0E2-76BBFD4E90CD",
                "versionEndExcluding": "9.0.101",
                "vulnerable": true
              },
              {
                "criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "8BF69915-915D-44CA-9027-206E44B89B78",
                "versionEndExcluding": "10.1.37",
                "versionStartIncluding": "10.1.0",
                "vulnerable": true
              },
              {
                "criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "0EF54F3C-5527-44DB-AAD0-109A081A742B",
                "versionEndExcluding": "11.0.5",
                "versionStartIncluding": "11.0.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1 through 10.1.36, from 9.0.0.M1 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.\n\nUsers are recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, which fixes the issue."
      },
      {
        "lang": "es",
        "value": "Vulnerabilidad de Paso Crítico Faltante en la Autenticación en Apache Tomcat cuando el JNDIRealm estaba configurado para autenticar enlaces usando GSSAPI permitió a los atacantes autenticarse sin proporcionar la contraseña correcta.\n\nEste problema afecta a Apache Tomcat: desde 11.0.0-M1 hasta 11.0.4, desde 10.1.0-M1 hasta 10.1.36, desde 9.0.0.M1 hasta 9.0.100, desde 8.5.0 hasta 8.5.100, desde 7.0.0 hasta 7.0.109.\n\nSe recomienda a los usuarios actualizar a la versión 11.0.5, 10.1.37 o 9.0.101, que corrige el problema."
      }
    ],
    "id": "CVE-2026-55957",
    "lastModified": "2026-10-25T21:10:00.770",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 3.4,
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2026-55957",
            "options": [
              {
                "exploitation": "none"
              },
              {
                "automatable": "yes"
              },
              {
                "technicalImpact": "total"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-06-30T13:26:38.087999Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-06-29T21:16:45.700",
    "references": [
      {
        "source": "security@apache.org",
        "tags": [
          "Vendor Advisory",
          "Mailing List"
        ],
        "url": "https://lists.apache.org/thread/7fk339o5jvd4mcgsf0chbrn4o525ccjh"
      },
      {
        "source": "af854a3a-2127-422b-91ae-364da2661108",
        "tags": [
          "Third Party Advisory"
        ],
        "url": "http://www.openwall.com/lists/oss-security/2026/06/29/26"
      }
    ],
    "sourceIdentifier": "security@apache.org",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-304"
          }
        ],
        "source": "security@apache.org",
        "type": "Secondary"
      }
    ]
  },
  "severity": "HIGH",
  "source": "nvd",
  "title": "Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authentic..."
}