usn-8417-1
Vulnerability from osv_ubuntu
Published
2026-06-10 06:44
Modified
2026-06-11 08:29
Summary
tomcat9, tomcat10 vulnerabilities
Details

It was discovered that Tomcat did not properly limit the size of WebDAV LOCK and PROPFIND request bodies. A remote attacker could 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 use this issue to obtain sensitive credentials. (CVE-2026-42498)

It was discovered that Tomcat incorrectly handled digest authentication. A remote attacker could possibly use this issue to bypass authentication restrictions. (CVE-2026-43512)

It was discovered that Tomcat incorrectly handled case sensitivity in LockOutRealm. A remote attacker could possibly use this issue to bypass account lockout protections and obtain sensitive information. (CVE-2026-43513)

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"
                },
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                  "score": "medium",
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                }
              ]
            },
            {
              "id": "CVE-2026-41293",
              "severity": [
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                  "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-2026-43512",
              "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-2026-43513",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
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                }
              ]
            },
            {
              "id": "CVE-2026-43515",
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        "name": "tomcat9",
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        "9.0.16-3ubuntu0.18.04.1",
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        "9.0.16-3ubuntu0.18.04.2+esm2",
        "9.0.16-3ubuntu0.18.04.2+esm3",
        "9.0.16-3ubuntu0.18.04.2+esm4",
        "9.0.16-3ubuntu0.18.04.2+esm5",
        "9.0.16-3ubuntu0.18.04.2+esm6",
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    },
    {
      "database_specific": {
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            {
              "id": "CVE-2026-41284",
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                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
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            {
              "id": "CVE-2026-41293",
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                  "type": "CVSS_V3"
                },
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                  "score": "medium",
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            },
            {
              "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-2026-43512",
              "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-2026-43513",
              "severity": [
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                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
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              "id": "CVE-2026-43515",
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                },
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                }
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        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
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            "binary_name": "libtomcat9-embed-java",
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          }
        ]
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        "name": "tomcat9",
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      },
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        "9.0.31-1",
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        "9.0.31-1ubuntu0.2",
        "9.0.31-1ubuntu0.3",
        "9.0.31-1ubuntu0.4",
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        "9.0.31-1ubuntu0.6",
        "9.0.31-1ubuntu0.7",
        "9.0.31-1ubuntu0.8",
        "9.0.31-1ubuntu0.9",
        "9.0.31-1ubuntu0.9+esm1",
        "9.0.31-1ubuntu0.9+esm2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
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              "id": "CVE-2026-41284",
              "severity": [
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            {
              "id": "CVE-2026-41293",
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                  "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-2026-43512",
              "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-2026-43513",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
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              ]
            },
            {
              "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"
                },
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                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
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            "binary_name": "libtomcat9-embed-java",
            "binary_version": "9.0.58-1ubuntu0.2+esm4"
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            "binary_name": "libtomcat9-java",
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          {
            "binary_name": "tomcat9",
            "binary_version": "9.0.58-1ubuntu0.2+esm4"
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            "binary_name": "tomcat9-admin",
            "binary_version": "9.0.58-1ubuntu0.2+esm4"
          },
          {
            "binary_name": "tomcat9-common",
            "binary_version": "9.0.58-1ubuntu0.2+esm4"
          },
          {
            "binary_name": "tomcat9-docs",
            "binary_version": "9.0.58-1ubuntu0.2+esm4"
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          {
            "binary_name": "tomcat9-examples",
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          },
          {
            "binary_name": "tomcat9-user",
            "binary_version": "9.0.58-1ubuntu0.2+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "tomcat9",
        "purl": "pkg:deb/ubuntu/tomcat9@9.0.58-1ubuntu0.2+esm4?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.0.58-1ubuntu0.2+esm4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.0.43-3",
        "9.0.54-1",
        "9.0.55-1",
        "9.0.58-1",
        "9.0.58-1ubuntu0.1",
        "9.0.58-1ubuntu0.1+esm1",
        "9.0.58-1ubuntu0.1+esm2",
        "9.0.58-1ubuntu0.1+esm3",
        "9.0.58-1ubuntu0.1+esm4",
        "9.0.58-1ubuntu0.2",
        "9.0.58-1ubuntu0.2+esm1",
        "9.0.58-1ubuntu0.2+esm2",
        "9.0.58-1ubuntu0.2+esm3"
      ]
    },
    {
      "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-2026-43512",
              "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-2026-43513",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "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:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libtomcat10-embed-java",
            "binary_version": "10.1.16-1ubuntu0.1~esm4"
          },
          {
            "binary_name": "libtomcat10-java",
            "binary_version": "10.1.16-1ubuntu0.1~esm4"
          },
          {
            "binary_name": "tomcat10",
            "binary_version": "10.1.16-1ubuntu0.1~esm4"
          },
          {
            "binary_name": "tomcat10-admin",
            "binary_version": "10.1.16-1ubuntu0.1~esm4"
          },
          {
            "binary_name": "tomcat10-common",
            "binary_version": "10.1.16-1ubuntu0.1~esm4"
          },
          {
            "binary_name": "tomcat10-docs",
            "binary_version": "10.1.16-1ubuntu0.1~esm4"
          },
          {
            "binary_name": "tomcat10-examples",
            "binary_version": "10.1.16-1ubuntu0.1~esm4"
          },
          {
            "binary_name": "tomcat10-user",
            "binary_version": "10.1.16-1ubuntu0.1~esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "tomcat10",
        "purl": "pkg:deb/ubuntu/tomcat10@10.1.16-1ubuntu0.1~esm4?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "10.1.16-1ubuntu0.1~esm4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "10.1.10-1",
        "10.1.14-1",
        "10.1.15-1",
        "10.1.16-1",
        "10.1.16-1ubuntu0.1~esm1",
        "10.1.16-1ubuntu0.1~esm2",
        "10.1.16-1ubuntu0.1~esm3"
      ]
    },
    {
      "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-2026-43512",
              "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-2026-43513",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "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:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libtomcat9-java",
            "binary_version": "9.0.70-2ubuntu0.1+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "tomcat9",
        "purl": "pkg:deb/ubuntu/tomcat9@9.0.70-2ubuntu0.1+esm3?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
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          "type": "ECOSYSTEM"
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      ],
      "versions": [
        "9.0.70-1ubuntu1",
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                  "score": "medium",
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                }
              ]
            },
            {
              "id": "CVE-2026-41293",
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                {
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                  "score": "medium",
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                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
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                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
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            },
            {
              "id": "CVE-2026-43512",
              "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-2026-43513",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
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                {
                  "score": "medium",
                  "type": "Ubuntu"
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            },
            {
              "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",
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          "ecosystem": "Ubuntu:25.10"
        }
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        "availability": "No subscription required",
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        "10.1.40-1",
        "10.1.40-1ubuntu1"
      ]
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          "cves": [
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              "id": "CVE-2026-41284",
              "severity": [
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                },
                {
                  "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-2026-43512",
              "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-2026-43513",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "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"
                }
              ]
            }
          ],
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        }
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      "ecosystem_specific": {
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      },
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          "events": [
            {
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            },
            {
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      ],
      "versions": [
        "9.0.70-2ubuntu1.1",
        "9.0.70-2ubuntu2",
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      "database_specific": {
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                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
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                }
              ]
            },
            {
              "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-2026-43512",
              "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-2026-43513",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "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:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libtomcat10-embed-java",
            "binary_version": "10.1.40-1ubuntu1.26.04.1"
          },
          {
            "binary_name": "libtomcat10-java",
            "binary_version": "10.1.40-1ubuntu1.26.04.1"
          },
          {
            "binary_name": "tomcat10",
            "binary_version": "10.1.40-1ubuntu1.26.04.1"
          },
          {
            "binary_name": "tomcat10-admin",
            "binary_version": "10.1.40-1ubuntu1.26.04.1"
          },
          {
            "binary_name": "tomcat10-common",
            "binary_version": "10.1.40-1ubuntu1.26.04.1"
          },
          {
            "binary_name": "tomcat10-docs",
            "binary_version": "10.1.40-1ubuntu1.26.04.1"
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          {
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            "binary_version": "10.1.40-1ubuntu1.26.04.1"
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          {
            "binary_name": "tomcat10-user",
            "binary_version": "10.1.40-1ubuntu1.26.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "tomcat10",
        "purl": "pkg:deb/ubuntu/tomcat10@10.1.40-1ubuntu1.26.04.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
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            {
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "10.1.40-1ubuntu1"
      ]
    },
    {
      "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-2026-43512",
              "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-2026-43513",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "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:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libtomcat9-java",
            "binary_version": "9.0.115-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "tomcat9",
        "purl": "pkg:deb/ubuntu/tomcat9@9.0.115-1ubuntu0.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.0.115-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.0.95-1ubuntu1",
        "9.0.111-1",
        "9.0.115-1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that Tomcat did not properly limit the size of\nWebDAV LOCK and PROPFIND request bodies. A remote attacker could\nuse 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 use this issue to obtain\nsensitive credentials. (CVE-2026-42498)\n\nIt was discovered that Tomcat incorrectly handled digest\nauthentication. A remote attacker could possibly use this issue to\nbypass authentication restrictions. (CVE-2026-43512)\n\nIt was discovered that Tomcat incorrectly handled case sensitivity\nin LockOutRealm. A remote attacker could possibly use this issue to\nbypass account lockout protections and obtain sensitive information.\n(CVE-2026-43513)\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-8417-1",
  "modified": "2026-06-11T08:29:19Z",
  "published": "2026-06-10T06:44:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8417-1"
    },
    {
      "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-2026-43512"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-43513"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-43515"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "tomcat9, tomcat10 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-41284",
    "UBUNTU-CVE-2026-41293",
    "UBUNTU-CVE-2026-42498",
    "UBUNTU-CVE-2026-43512",
    "UBUNTU-CVE-2026-43513",
    "UBUNTU-CVE-2026-43515"
  ]
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.