Apache Camel: Camel-Atmosphere-Websocket: WebSocket dispatch header injection

{
  "id": "c8aee7ed81dcef3a273488c47c243ef755141bb98df8c32c779a6bc31354b8d9",
  "url": "https://osv.dev/vulnerability/CVE-2026-71300",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Apache Camel: Camel-Atmosphere-Websocket: WebSocket dispatch header injection",
    "summary": "Improper input validation vulnerability in Apache Camel Atmosphere Websocket component. This issue affects Apache Camel: from 4.0.0 before 4.14.9, from 4.15.0 before 4.18.4, from 4.19.0 before 4.22.0. The camel-atmosphere-websocket producer selects which connected WebSocket peers a message is delivered to through Exchange headers, and the string values of those headers sat outside the Camel namespace: websocket.connectionKey and websocket.connectionKey.list, along with websocket.sendToAll, websocket.eventType and websocket.errorType. WebsocketEndpoint extends ServletEndpoint and so inherits HttpHeaderFilterStrategy, which filters only the Camel and camel prefixes; the dotted names therefore fell outside the filtered namespace and were admitted in both directions by every HTTP-family consumer. In a route bridging an HTTP consumer into an atmosphere-websocket producer, an external sender could supply the list header and take over the producer's dispatch decision. WebsocketProducer.process tests the list header before the single-key header, so an injected value discarded the recipient the route had selected: a notification intended for one connected client could be suppressed, or delivered instead to a different client whose connection key the sender knows. The header need not be a query parameter and need not be supplied as a list literally - Camel's HTTP binding promotes a repeated header name, and a bracketed value, to a List when mapping onto the Exchange - so an ordinary in",
    "evidence": "osv:CVE-2026-71300",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-71300",
      "aliases": [
        "CVE-2026-71300",
        "GHSA-m5r8-w65q-8wjf"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/camel",
              "type": "GIT",
              "events": [
                {
                  "introduced": "8d135894cd73970c82da5da0dc71ecc7f5521ad5"
                },
                {
                  "fixed": "65a5006348be3c4543cf722466c62c7947cc4f3b"
                },
                {
                  "introduced": "038f1b2acd0b2ee78e4bb84cd3139e64610bb259"
                },
                {
                  "fixed": "db322df8384554f65000afdce120a26c2e942617"
                },
                {
                  "introduced": "3e9f3011ad48de66fef582ade9794c7340c23af7"
                },
                {
                  "fixed": "1a54683f4becad3b32df42507e709526d8563f35"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:camel:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.0.0"
                      },
                      {
                        "fixed": "4.14.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:apache:camel:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.15.0"
                      },
                      {
                        "fixed": "4.18.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:apache:camel:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.19.0"
                      },
                      {
                        "fixed": "4.22.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71300.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.217794730Z",
      "provider": "osv",
      "references": [
        "https://repo.maven.apache.org/maven2",
        "https://camel.apache.org/security/CVE-2026-71300.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71300.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-71300"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-20"
        ],
        "cna_assigner": "apache",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "4.0.0"
                  },
                  {
                    "fixed": "4.14.9"
                  },
                  {
                    "introduced": "4.15.0"
                  },
                  {
                    "fixed": "4.18.4"
                  },
                  {
                    "introduced": "4.19.0"
                  },
                  {
                    "fixed": "4.22.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71300.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-71300",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496283,
  "published_at": "2026-08-24T16:21:17.218+00:00"
}