October CMS SSRF Protection ResizeImages.php validateExternalImageHost server-side request forgery

{
  "id": "17a1ed64c2cf1a6689cf1d524378a932a3618d9e54e77e454de981eca319ee2b",
  "url": "https://osv.dev/vulnerability/CVE-2026-101005",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "October CMS SSRF Protection ResizeImages.php validateExternalImageHost server-side request forgery",
    "summary": "A vulnerability was detected in October CMS up to 4.3.4. This affects the function validateExternalImageHost of the file System/Classes/ResizeImages.php of the component SSRF Protection. The manipulation results in server-side request forgery. The attack may be launched remotely. The exploit is now public and may be used. Upgrading to version 4.3.5 is able to mitigate this issue. You should upgrade the affected component.",
    "evidence": "osv:CVE-2026-101005",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-101005",
      "aliases": [
        "CVE-2026-101005",
        "GHSA-j2j7-7m99-6226"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/octobercms/october",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1a8c0b1876185fc29b91df718e07eb5104827107"
                },
                {
                  "fixed": "1024483d1e9ff04bf8b3b1ede7b02db018a385c7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "4.3.0"
                      },
                      {
                        "last_affected": "4.3.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "4.3.1"
                      },
                      {
                        "last_affected": "4.3.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "4.3.2"
                      },
                      {
                        "last_affected": "4.3.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "4.3.4"
                      },
                      {
                        "last_affected": "4.3.4"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "fixed": "1024483d1e9ff04bf8b3b1ede7b02db018a385c7"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v4.3.5"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.3.0",
            "4.3.1",
            "4.3.2",
            "4.3.4",
            "v4.3.4",
            "v4.3.2",
            "v4.3.1",
            "v4.3.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-101005.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:33.986913579Z",
      "provider": "osv",
      "references": [
        "https://www.cybersecurity-help.cz/vdb/vulns/149488/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/101xxx/CVE-2026-101005.json",
        "https://github.com/octobercms/october/security/advisories/GHSA-j2j7-7m99-6226",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-101005",
        "https://vuldb.com/cve/CVE-2026-101005",
        "https://vuldb.com/submit/922294",
        "https://vuldb.com/vuln/410875",
        "https://vuldb.com/vuln/410875/cti",
        "https://github.com/octobercms/october/releases/tag/v4.3.5",
        "https://github.com/0xGenesi/CVE/blob/main/October_CMS_SSRF_IPv6_Mapped_IPv4_Bypass.md"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "VulDB",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "4.3.3"
                  },
                  {
                    "last_affected": "4.3.3"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandaloneSingleVersion"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/101xxx/CVE-2026-101005.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-101005",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 500936,
  "published_at": "2026-09-28T06:00:10.375+00:00"
}