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USN-8450-1 (UBUNTU-CVE-2026-41284)

Vulnerability from osv_ubuntu – Published: 2026-06-18 15:56 – Updated: 2026-06-18 15:56 – Source website
VLAI
Summary
tomcat11 vulnerabilities
Details

It was discovered that Tomcat did not properly limit the size of WebDAV LOCK and PROPFIND request bodies. A remote attacker could possibly use this issue to cause Tomcat to consume excessive memory, resulting in a denial of service. (CVE-2026-41284)

It was discovered that Tomcat incorrectly validated HTTP/2 header fields. A remote attacker could use this issue to cause Tomcat to crash or possibly execute arbitrary code. (CVE-2026-41293)

It was discovered that Tomcat did not properly clear HTTP authentication headers during WebSocket connection upgrades and redirects. A remote attacker could possibly use this issue to obtain sensitive credentials. (CVE-2026-42498)

It was discovered that Tomcat incorrectly handled authorization when multiple method constraints defined the same HTTP method. A remote attacker could possibly use this issue to bypass authorization restrictions. (CVE-2026-43515)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-41284",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-41293",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-42498",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-43515",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libtomcat11-embed-java",
            "binary_version": "11.0.18-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libtomcat11-java",
            "binary_version": "11.0.18-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "tomcat11",
            "binary_version": "11.0.18-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "tomcat11-admin",
            "binary_version": "11.0.18-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "tomcat11-common",
            "binary_version": "11.0.18-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "tomcat11-docs",
            "binary_version": "11.0.18-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "tomcat11-examples",
            "binary_version": "11.0.18-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "tomcat11-user",
            "binary_version": "11.0.18-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:26.04:LTS",
        "name": "tomcat11",
        "purl": "pkg:deb/ubuntu/tomcat11@11.0.18-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "11.0.18-1ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "11.0.6-1",
        "11.0.11-1",
        "11.0.15-1",
        "11.0.18-1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that Tomcat did not properly limit the size of\nWebDAV LOCK and PROPFIND request bodies. A remote attacker could\npossibly use this issue to cause Tomcat to consume excessive memory,\nresulting in a denial of service. (CVE-2026-41284)\n\nIt was discovered that Tomcat incorrectly validated HTTP/2 header\nfields. A remote attacker could use this issue to cause Tomcat to\ncrash or possibly execute arbitrary code. (CVE-2026-41293)\n\nIt was discovered that Tomcat did not properly clear HTTP\nauthentication headers during WebSocket connection upgrades and\nredirects. A remote attacker could possibly use this issue to obtain\nsensitive credentials. (CVE-2026-42498)\n\nIt was discovered that Tomcat incorrectly handled authorization\nwhen multiple method constraints defined the same HTTP method. A\nremote attacker could possibly use this issue to bypass\nauthorization restrictions. (CVE-2026-43515)",
  "id": "USN-8450-1",
  "modified": "2026-06-18T15:56:22Z",
  "published": "2026-06-18T15:56:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8450-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-41284"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-41293"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-42498"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-43515"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "tomcat11 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-41284",
    "UBUNTU-CVE-2026-41293",
    "UBUNTU-CVE-2026-42498",
    "UBUNTU-CVE-2026-43515"
  ]
}



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