Webmail — security advisory

{
  "id": "533612f2f7fc5f370af387f9e5de77e3dca4e228c97d7730e094bbdaee4a48bb",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-114730",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-114730",
    "summary": "Roundcube Webmail 1.6.14 before 1.6.20 and 1.7.0 before 1.7.5 is affected by a server-side request forgery filter bypass. The network blocklist used by rcube_utils::is_local_url() omitted the RFC 6052 NAT64 prefix 64:ff9b::/96, the RFC 8215 local-use NAT64 prefix 64:ff9b:1::/48 and the unspecified address ::/128, so URLs such as http://[64:ff9b::7f00:1]/ passed the filter and reached loopback, link-local and cloud metadata addresses. Upstream fixed this in the commit “Fix SSRF filter (is_local_url()) bypass via NAT64 64:ff9b::/96”.",
    "evidence": "cve:CVE-2026-114730",
    "products": [
      {
        "name": {
          "value": "Webmail",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-114730",
      "aliases": [
        "CVE-2026-114730"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV3_1": {
            "scope": "CHANGED",
            "version": "3.1",
            "baseScore": 7.2,
            "attackVector": "NETWORK",
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
            "integrityImpact": "LOW",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "availabilityImpact": "NONE",
            "privilegesRequired": "NONE",
            "confidentialityImpact": "LOW"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "affected": [
        {
          "repo": "https://github.com/roundcube/roundcubemail/",
          "vendor": "Roundcube",
          "product": "Webmail",
          "versions": [
            {
              "status": "affected",
              "version": "1.6.14",
              "lessThan": "1.6.20",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "1.7.0",
              "lessThan": "1.7.5",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-28T02:18:48.643Z",
      "provider": "cve",
      "references": [
        "https://bugs.debian.org/1151279",
        "https://github.com/roundcube/roundcubemail/commit/6e1d480e730a45f29829b6a11af608d5d6eb3db6",
        "https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5",
        "https://github.com/roundcube/roundcubemail/releases/tag/1.7.5",
        "https://github.com/roundcube/roundcubemail/releases/tag/1.6.20",
        "https://github.com/roundcube/roundcubemail/commit/3c3a65f66b53b7aaf3d720acd06e0b102eceb090"
      ],
      "provider_metadata": {
        "adp": [
          {
            "title": "CISA ADP Vulnrichment",
            "metrics": [
              {
                "other": {
                  "type": "ssvc",
                  "content": {
                    "id": "CVE-2026-114730",
                    "role": "CISA Coordinator",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "version": "2.0.3",
                    "timestamp": "2026-10-28T02:18:39.748510Z"
                  }
                }
              }
            ],
            "providerMetadata": {
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP",
              "dateUpdated": "2026-10-28T02:18:48.643Z"
            }
          }
        ],
        "cna": {
          "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
          "shortName": "mitre",
          "dateUpdated": "2026-10-22T02:09:40.059Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-114730",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 406265,
  "published_at": "2026-10-22T02:09:40.059+00:00"
}