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USN-8383-1 (UBUNTU-CVE-2026-43512)

Vulnerability from osv_ubuntu – Published: 2026-06-04 13:15 – Updated: 2026-06-05 09:04 – Source website
VLAI
Summary
tomcat6, tomcat7 vulnerabilities
Details

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-2026-43512",
              "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:14.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libservlet2.4-java",
            "binary_version": "6.0.39-1ubuntu0.1+esm3"
          },
          {
            "binary_name": "libservlet2.5-java",
            "binary_version": "6.0.39-1ubuntu0.1+esm3"
          },
          {
            "binary_name": "libtomcat6-java",
            "binary_version": "6.0.39-1ubuntu0.1+esm3"
          },
          {
            "binary_name": "tomcat6",
            "binary_version": "6.0.39-1ubuntu0.1+esm3"
          },
          {
            "binary_name": "tomcat6-admin",
            "binary_version": "6.0.39-1ubuntu0.1+esm3"
          },
          {
            "binary_name": "tomcat6-common",
            "binary_version": "6.0.39-1ubuntu0.1+esm3"
          },
          {
            "binary_name": "tomcat6-docs",
            "binary_version": "6.0.39-1ubuntu0.1+esm3"
          },
          {
            "binary_name": "tomcat6-examples",
            "binary_version": "6.0.39-1ubuntu0.1+esm3"
          },
          {
            "binary_name": "tomcat6-extras",
            "binary_version": "6.0.39-1ubuntu0.1+esm3"
          },
          {
            "binary_name": "tomcat6-user",
            "binary_version": "6.0.39-1ubuntu0.1+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "tomcat6",
        "purl": "pkg:deb/ubuntu/tomcat6@6.0.39-1ubuntu0.1+esm3?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.0.39-1ubuntu0.1+esm3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.0.37-1",
        "6.0.39-1",
        "6.0.39-1ubuntu0.1",
        "6.0.39-1ubuntu0.1+esm1",
        "6.0.39-1ubuntu0.1+esm2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "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:14.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libservlet3.0-java",
            "binary_version": "7.0.52-1ubuntu0.16+esm2"
          },
          {
            "binary_name": "libtomcat7-java",
            "binary_version": "7.0.52-1ubuntu0.16+esm2"
          },
          {
            "binary_name": "tomcat7",
            "binary_version": "7.0.52-1ubuntu0.16+esm2"
          },
          {
            "binary_name": "tomcat7-admin",
            "binary_version": "7.0.52-1ubuntu0.16+esm2"
          },
          {
            "binary_name": "tomcat7-common",
            "binary_version": "7.0.52-1ubuntu0.16+esm2"
          },
          {
            "binary_name": "tomcat7-docs",
            "binary_version": "7.0.52-1ubuntu0.16+esm2"
          },
          {
            "binary_name": "tomcat7-examples",
            "binary_version": "7.0.52-1ubuntu0.16+esm2"
          },
          {
            "binary_name": "tomcat7-user",
            "binary_version": "7.0.52-1ubuntu0.16+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "tomcat7",
        "purl": "pkg:deb/ubuntu/tomcat7@7.0.52-1ubuntu0.16+esm2?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.0.52-1ubuntu0.16+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "7.0.42-1",
        "7.0.47-1",
        "7.0.50-1",
        "7.0.52-1",
        "7.0.52-1ubuntu0.1",
        "7.0.52-1ubuntu0.3",
        "7.0.52-1ubuntu0.6",
        "7.0.52-1ubuntu0.7",
        "7.0.52-1ubuntu0.8",
        "7.0.52-1ubuntu0.9",
        "7.0.52-1ubuntu0.10",
        "7.0.52-1ubuntu0.11",
        "7.0.52-1ubuntu0.13",
        "7.0.52-1ubuntu0.14",
        "7.0.52-1ubuntu0.15",
        "7.0.52-1ubuntu0.16",
        "7.0.52-1ubuntu0.16+esm1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "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:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libservlet3.0-java",
            "binary_version": "7.0.68-1ubuntu0.4+esm4"
          },
          {
            "binary_name": "libtomcat7-java",
            "binary_version": "7.0.68-1ubuntu0.4+esm4"
          },
          {
            "binary_name": "tomcat7",
            "binary_version": "7.0.68-1ubuntu0.4+esm4"
          },
          {
            "binary_name": "tomcat7-admin",
            "binary_version": "7.0.68-1ubuntu0.4+esm4"
          },
          {
            "binary_name": "tomcat7-common",
            "binary_version": "7.0.68-1ubuntu0.4+esm4"
          },
          {
            "binary_name": "tomcat7-docs",
            "binary_version": "7.0.68-1ubuntu0.4+esm4"
          },
          {
            "binary_name": "tomcat7-examples",
            "binary_version": "7.0.68-1ubuntu0.4+esm4"
          },
          {
            "binary_name": "tomcat7-user",
            "binary_version": "7.0.68-1ubuntu0.4+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "tomcat7",
        "purl": "pkg:deb/ubuntu/tomcat7@7.0.68-1ubuntu0.4+esm4?arch=source\u0026distro=esm-apps-legacy/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.0.68-1ubuntu0.4+esm4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "7.0.64-1",
        "7.0.68-1",
        "7.0.68-1ubuntu0.1",
        "7.0.68-1ubuntu0.3",
        "7.0.68-1ubuntu0.4",
        "7.0.68-1ubuntu0.4+esm1",
        "7.0.68-1ubuntu0.4+esm2",
        "7.0.68-1ubuntu0.4+esm3"
      ]
    }
  ],
  "aliases": [],
  "details": "It 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 when\nmultiple method constraints defined the same HTTP method. A remote\nattacker could possibly use this issue to bypass authorization\nrestrictions. (CVE-2026-43515)",
  "id": "USN-8383-1",
  "modified": "2026-06-05T09:04:21Z",
  "published": "2026-06-04T13:15:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8383-1"
    },
    {
      "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": "tomcat6, tomcat7 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-43512",
    "UBUNTU-CVE-2026-43513",
    "UBUNTU-CVE-2026-43515"
  ]
}



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