Unauthenticated authorization bypass in ConstraintSecurityHandler - HTTP method-omission matched by substring

{
  "id": "2fc8c867cb1f052ea6558a93b7de283d2a1746d305ead7c0b623be2c12c9f376",
  "url": "https://osv.dev/vulnerability/CVE-2026-18659",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Unauthenticated authorization bypass in ConstraintSecurityHandler - HTTP method-omission matched by substring",
    "summary": "In Eclipse Jetty, across various versions of `jetty-security`, and `jetty-eeN-security`, and `jetty-eeN-servlet`, the Jakarta Spec constraints defined as `http-method-omission` can be bypassed by using substrings of the defined HTTP Methods.",
    "evidence": "osv:CVE-2026-18659",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-18659",
      "aliases": [
        "CVE-2026-18659",
        "GHSA-53x7-f9fc-h7qr"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/jetty/jetty.project",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c8372b65bd15404de1444d68902c0455a3a69b64"
                },
                {
                  "last_affected": "6c1ced3f077bc633716c54758a743b09b21328e8"
                },
                {
                  "introduced": "28100e8da711e44c0722ed10bd413ae862497539"
                },
                {
                  "last_affected": "bdf87d35991b6459dec358c6012412e329f110b3"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "12.1.0"
                      },
                      {
                        "last_affected": "12.1.11"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "12.0.0"
                      },
                      {
                        "last_affected": "12.0.38"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "jetty-12.0.38",
            "jetty-12.1.11",
            "jetty-12.0.37",
            "jetty-12.1.5",
            "jetty-12.0.31",
            "jetty-12.1.4",
            "jetty-12.0.30",
            "jetty-12.1.2",
            "jetty-12.0.23",
            "jetty-12.1.0.beta1",
            "jetty-12.0.22",
            "jetty-12.0.19",
            "jetty-12.0.15",
            "jetty-12.0.14",
            "jetty-12.0.6",
            "jetty-12.0.5",
            "jetty-12.0.0x"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-18659.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.174299306Z",
      "provider": "osv",
      "references": [
        "https://gitlab.eclipse.org/security/cve-assignment/-/work_items/214",
        "https://repo.maven.apache.org/maven2/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18659.json",
        "https://github.com/jetty/jetty.project/security/advisories/GHSA-53x7-f9fc-h7qr",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-18659"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "cna_assigner": "eclipse",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "11.0.0"
                  },
                  {
                    "last_affected": "11.0.32"
                  },
                  {
                    "introduced": "10.0.0"
                  },
                  {
                    "last_affected": "10.0.32"
                  },
                  {
                    "introduced": "7.6.13"
                  },
                  {
                    "last_affected": "9.4.64"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18659.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-18659",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 489583,
  "published_at": "2026-10-15T09:44:11.148+00:00"
}