Wekan: SSRF filter bypass via DNS-resolving hostname in outgoing webhooks (incomplete fix of CVE-2026-53446)

{
  "id": "ed4c1dc98fbb54b3ede108e0209f472def057b97c8d32a36b3880664c4cf295c",
  "url": "https://osv.dev/vulnerability/CVE-2026-68558",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Wekan: SSRF filter bypass via DNS-resolving hostname in outgoing webhooks (incomplete fix of CVE-2026-53446)",
    "summary": "Wekan is open source kanban built with Meteor. From 8.36 until 9.74, the outgoing webhook Integration URL validator in models/integrations.js checked only the literal URL.hostname against regular expressions, so DNS names such as 169-254-169-254.nip.io passed that first-line check. The delivery path's fetchSafe guard already blocked the reported IPv4 destination, but its separate IPv4-only resolver and duplicated blocklist created inconsistent all-address-family enforcement and drift risk between input-time and connection-time validation. Version 9.74 makes server/lib/ssrfGuard.js resolve all addresses with `dns.lookup({ all: true })`, validate every result through the shared isIpBlocked logic, pin the connection, and block redirects. This issue is fixed in version 9.74.",
    "evidence": "osv:CVE-2026-68558",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-68558",
      "aliases": [
        "CVE-2026-68558",
        "GHSA-66m2-4wfr-c45p"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wekan/wekan",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9da7adad9572170c9974a1c9e1c3fc44393a85ae"
                },
                {
                  "fixed": "ca9bcfa4eeaf6293737f038381f4a3e91569f851"
                },
                {
                  "fixed": "ef845fe4a0adb82af436313310939cd48c0b1347"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "8.36"
                      },
                      {
                        "fixed": "9.74"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "ef845fe4a0adb82af436313310939cd48c0b1347"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "ca9bcfa4eeaf6293737f038381f4a3e91569f851"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v9.74"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68558.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.818935685Z",
      "provider": "osv",
      "references": [
        "https://github.com/wekan/wekan/releases/tag/v9.74",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68558.json",
        "https://github.com/wekan/wekan/security/advisories/GHSA-66m2-4wfr-c45p",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-68558",
        "https://github.com/wekan/wekan/commit/ef845fe4a0adb82af436313310939cd48c0b1347"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68558.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-68558",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491507,
  "published_at": "2026-08-19T19:22:18.718+00:00"
}