Apache Camel DNS: The dns.* and term Exchange header constants used non-Camel-prefixed names that bypass the HTTP header filter, allowing an HTTP client to influence internal behaviour

{
  "id": "9cfdeac1574ed928d50f385df14da9a6eb409bd3bcaf1a1bb7916d3221fd191c",
  "url": "https://osv.dev/vulnerability/CVE-2026-48205",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Apache Camel DNS: The dns.* and term Exchange header constants used non-Camel-prefixed names that bypass the HTTP header filter, allowing an HTTP client to influence internal behaviour",
    "summary": "Improper Input Validation, Server-Side Request Forgery (SSRF) vulnerability in Apache Camel DNS component. The camel-dns producers read DNS operation parameters - the resolver to query, the name or domain to look up, the record type and class, and the search term - from Exchange message headers whose constant values (DnsConstants.DNS_SERVER, DNS_NAME, DNS_DOMAIN, DNS_TYPE, DNS_CLASS, TERM) were the plain strings dns.server, dns.name, dns.domain, dns.type, dns.class and term. Because these names do not start with the Camel / camel prefix, HttpHeaderFilterStrategy - which blocks only the Camel header namespace on the HTTP boundary - let them pass from an inbound HTTP request straight into the Exchange. In a route that bridges an HTTP consumer (for example platform-http) into a dns: producer, any HTTP client could therefore set the dns.server header to make the dig producer build a SimpleResolver pointing at an attacker-controlled DNS server - a server-side request forgery via DNS, through which the attacker observes the queried name and can return poisoned responses - and set the dns.name / dns.domain headers to resolve arbitrary internal hostnames, disclosing whether they exist (internal network reconnaissance). No credentials are required when the bridging consumer is unauthenticated. This issue affects Apache Camel: from 4.0.0 before 4.14.8, from 4.15.0 before 4.18.3, from 4.19.0 before 4.21.0. Users are recommended to upgrade to version 4.21.0, which fixes the issue. If use",
    "evidence": "osv:CVE-2026-48205",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-48205",
      "aliases": [
        "CVE-2026-48205",
        "GHSA-hcm8-x79p-wx2w"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/camel",
              "type": "GIT",
              "events": [
                {
                  "introduced": "8d135894cd73970c82da5da0dc71ecc7f5521ad5"
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                {
                  "fixed": "1451d25df0fbfc7020514dc30f8ec9a59f759ae9"
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                  "introduced": "038f1b2acd0b2ee78e4bb84cd3139e64610bb259"
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                {
                  "fixed": "1d22f8df5d2dab2c309243879373230f4b24487d"
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              "database_specific": {
                "extracted_events": [
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                    "cpe": "cpe:2.3:a:apache:camel:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.0.0"
                      },
                      {
                        "fixed": "4.14.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:apache:camel:*:*:*:*:*:*:*:*",
                    "range": [
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                        "introduced": "4.15.0"
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                      {
                        "fixed": "4.18.3"
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                    "source": "CPE_RANGE"
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                    "cpe": "cpe:2.3:a:apache:camel:*:*:*:*:*:*:*:*",
                    "range": [
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                        "introduced": "4.19.0"
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                      {
                        "fixed": "4.21.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48205.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.889301250Z",
      "provider": "osv",
      "references": [
        "https://repo.maven.apache.org/maven2",
        "https://camel.apache.org/security/CVE-2026-48205.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48205.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-48205"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-20",
          "CWE-918"
        ],
        "cna_assigner": "apache",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "4.0.0"
                  },
                  {
                    "fixed": "4.14.8"
                  },
                  {
                    "introduced": "4.15.0"
                  },
                  {
                    "fixed": "4.18.3"
                  },
                  {
                    "introduced": "4.19.0"
                  },
                  {
                    "fixed": "4.21.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
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        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48205.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-48205",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 500159,
  "published_at": "2026-07-06T08:08:19.869+00:00"
}