{
  "document": {
    "aggregate_severity": {
      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      },
      {
        "category": "details",
        "text": "* SECURITY UPDATE: HTTP/2 requests without an authority bypassed strict\n     SNI validation - the fix for CVE-2026-32990 required an authority only\n     for CONNECT requests, so a request using any other method could omit it\n     and evade the host check\n     - debian/patches/CVE-2026-65637.patch: treat a missing serverName as a\n       missing header for all non-CONNECT HTTP/2 requests in\n       receivedEndOfHeaders()\n     - CVE-2026-65637\n   * SECURITY UPDATE: Denial of service via an allocation leak in the HTTP/2\n     backlog - resetting a stream that was waiting on the connection window\n     left its reservation counted in the backlog and its allocation\n     unreturned, so repeated resets exhausted the connection window and\n     stalled the connection\n     - debian/patches/CVE-2026-68763.patch: remove a replaced stream from the\n       backlog and return its unused allocation to the connection window,\n       decrement backLogSize when allocating, and skip streams that can no\n       longer write\n     - CVE-2026-68763",
        "title": "Details"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
    },
    "references": [
      {
        "category": "self",
        "summary": "https://cve.tuxcare.com/els/releases/CLSA-2026:1789461431",
        "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1789461431"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/debian11els/advisories/2026/clsa-2026_1789461431.json"
      }
    ],
    "tracking": {
      "current_release_date": "2026-09-15T08:37:56Z",
      "generator": {
        "date": "2026-09-15T08:37:56Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CLSA-2026:1789461431",
      "initial_release_date": "2026-09-15T08:37:56Z",
      "revision_history": [
        {
          "date": "2026-09-15T08:37:56Z",
          "number": "1",
          "summary": "Initial version"
        }
      ],
      "status": "final",
      "version": "1"
    },
    "title": "Fix CVE(s): CVE-2026-65637, CVE-2026-68763"
  },
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        "category": "vendor",
        "name": "Software in the Public Interest, Inc."
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            ],
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          }
        ],
        "category": "vendor",
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      }
    ],
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        },
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        "relates_to_product_reference": "Debian-11"
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        "full_product_name": {
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          "product_id": "Debian-11:tomcat9-0:9.0.118-0+deb11u1+tuxcare.els1.all"
        },
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        "relates_to_product_reference": "Debian-11"
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        },
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        "relates_to_product_reference": "Debian-11"
      },
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        "full_product_name": {
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        },
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        "relates_to_product_reference": "Debian-11"
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        "relates_to_product_reference": "Debian-11"
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-65637",
      "cwe": {
        "id": "CWE-20",
        "name": "Improper Input Validation"
      },
      "notes": [
        {
          "category": "description",
          "text": "Improper Input Validation vulnerability in Apache Tomcat due to incomplete fix for CVE-2026-32990.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.20 through 11.0.24, from 10.1.53 through 10.1.57, from 9.0.115 through 9.0.120.\n\n\n\nUsers are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.",
          "title": "Vulnerability description"
        }
      ],
      "product_status": {
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          "Debian-11:libtomcat9-java-0:9.0.118-0+deb11u1+tuxcare.els1.all",
          "Debian-11:tomcat9-0:9.0.118-0+deb11u1+tuxcare.els1.all",
          "Debian-11:tomcat9-admin-0:9.0.118-0+deb11u1+tuxcare.els1.all",
          "Debian-11:tomcat9-common-0:9.0.118-0+deb11u1+tuxcare.els1.all",
          "Debian-11:tomcat9-docs-0:9.0.118-0+deb11u1+tuxcare.els1.all",
          "Debian-11:tomcat9-examples-0:9.0.118-0+deb11u1+tuxcare.els1.all",
          "Debian-11:tomcat9-user-0:9.0.118-0+deb11u1+tuxcare.els1.all"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-65637"
        },
        {
          "category": "external",
          "summary": "https://lists.apache.org/thread/djog953z1ohsyt25bdvhfzbmsy22vgcj",
          "url": "https://lists.apache.org/thread/djog953z1ohsyt25bdvhfzbmsy22vgcj"
        }
      ],
      "release_date": "2026-08-25T22:17:00Z",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-09-15T08:37:13.239637Z",
          "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1789461431",
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            "Debian-11:libtomcat9-embed-java-0:9.0.118-0+deb11u1+tuxcare.els1.all",
            "Debian-11:libtomcat9-java-0:9.0.118-0+deb11u1+tuxcare.els1.all",
            "Debian-11:tomcat9-0:9.0.118-0+deb11u1+tuxcare.els1.all",
            "Debian-11:tomcat9-admin-0:9.0.118-0+deb11u1+tuxcare.els1.all",
            "Debian-11:tomcat9-common-0:9.0.118-0+deb11u1+tuxcare.els1.all",
            "Debian-11:tomcat9-docs-0:9.0.118-0+deb11u1+tuxcare.els1.all",
            "Debian-11:tomcat9-examples-0:9.0.118-0+deb11u1+tuxcare.els1.all",
            "Debian-11:tomcat9-user-0:9.0.118-0+deb11u1+tuxcare.els1.all"
          ],
          "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1789461431"
        }
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          "category": "impact",
          "details": "Important"
        }
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    },
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      "cwe": {
        "id": "CWE-400",
        "name": "Uncontrolled Resource Consumption"
      },
      "notes": [
        {
          "category": "description",
          "text": "Uncontrolled Resource Consumption vulnerability in Apache Tomcat via an allocation leak in the HTTP/2 backlog tracking when a stream is reset\n\n\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 9.0.39 through 9.0.120.\n\n\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 8.5.59 through 8.5.100. Other unsupported versions may also be affected.\n\n\n\nUsers are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.",
          "title": "Vulnerability description"
        }
      ],
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        },
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          "url": "https://lists.apache.org/thread/tv51ty39ppv41v04hdtkp9dp7tg02nzl"
        },
        {
          "category": "external",
          "summary": "http://www.openwall.com/lists/oss-security/2026/08/26/9",
          "url": "http://www.openwall.com/lists/oss-security/2026/08/26/9"
        }
      ],
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          "date": "2026-09-15T08:37:13.239637Z",
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        }
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          "details": "Important"
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    }
  ]
}