CVE-2026-65905: Apache Tomcat Authentication Bypass Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-9xv2-5v5q-p794",
  "modified" : "2026-09-02T22:38:14Z",
  "published" : "2026-08-26T00:30:52Z",
  "aliases" : [ "CVE-2026-65905" ],
  "summary" : "Apache Tomcat's DIGEST authenticator has an Authentication Bypass by Capture-replay vulnerability",
  "details" : "Authentication Bypass by Capture-replay vulnerability in Apache Tomcat's DIGEST authenticator. If, before windowSize requests have been made, a client makes a DIGEST authenticated request with a nonceCount on the upper boundary of the replay window then that request is replayable once only while the associated nonceCount remains within the replay window.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120.\n\nThe following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.30 through 7.0.109. Other unsupported versions may also be affected.\n\nUsers are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "11.0.0-M1"
      }, {
        "fixed" : "11.0.25"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "10.1.0-M1"
      }, {
        "fixed" : "10.1.58"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0.M1"
      }, {
        "fixed" : "9.0.121"
      } ]
    } ]
  }, {
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      "name" : "org.apache.tomcat:tomcat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.5.0"
      }, {
        "last_affected" : "8.5.100"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0.30"
      }, {
        "last_affected" : "7.0.109"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat.embed:tomcat-embed-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "11.0.0-M1"
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        "fixed" : "11.0.25"
      } ]
    } ]
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      "name" : "org.apache.tomcat.embed:tomcat-embed-core"
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    } ]
  }, {
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      "name" : "org.apache.tomcat.embed:tomcat-embed-core"
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        "introduced" : "9.0.0.M1"
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        "fixed" : "9.0.121"
      } ]
    } ]
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      "name" : "org.apache.tomcat.embed:tomcat-embed-core"
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    "ranges" : [ {
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        "last_affected" : "8.5.100"
      } ]
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      "name" : "org.apache.tomcat.embed:tomcat-embed-core"
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        "last_affected" : "7.0.109"
      } ]
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  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.tomcat:tomcat-catalina"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "11.0.0-M1"
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        "fixed" : "11.0.25"
      } ]
    } ]
  }, {
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      "name" : "org.apache.tomcat:tomcat-catalina"
    },
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  }, {
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      "name" : "org.apache.tomcat:tomcat-catalina"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
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        "fixed" : "9.0.121"
      } ]
    } ]
  }, {
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      "name" : "org.apache.tomcat:tomcat-catalina"
    },
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  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-65905"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/tomcat"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/9v114xlpgbzrrbzz5vf9f6r2q4wnxwwj"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/08/26/4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-294" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-02T22:38:14Z",
    "nvd_published_at" : "2026-08-25T22:17:05Z"
  }
}