Chaskiq through 2.0.3 Unauthenticated SSRF via /oembed Endpoint

{
  "id": "e812a76a95784673f9e81f6d4e670bbba264f9f675a21a790bbc7a8c0f6ee3f4",
  "url": "https://osv.dev/vulnerability/CVE-2026-111662",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Chaskiq through 2.0.3 Unauthenticated SSRF via /oembed Endpoint",
    "summary": "Chaskiq through 2.0.3 contains a server-side request forgery vulnerability that allows unauthenticated attackers to make the server fetch arbitrary URLs via the url parameter of the /oembed endpoint. Attackers can target loopback, private, or cloud-metadata addresses through FetchLinkCardService, which follows redirects and skips TLS verification, to read internal page titles and descriptions.",
    "evidence": "osv:CVE-2026-111662",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-111662",
      "aliases": [
        "CVE-2026-111662"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/chaskiq/chaskiq",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "2f487acfc9924c74db411ad2d0638140c1d379a1"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.0.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.0.3"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.0.3",
            "2.0.2",
            "2.0.1",
            "2.0.0",
            "1.1.2",
            "1.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111662.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.353352756Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111662.json",
        "https://hackmd.io/@hieuPenguinnn/chaskiq-unauthenticated-ssrf-oembed-url-upload",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-111662",
        "https://www.vulncheck.com/advisories/chaskiq-through-2.0.3-unauthenticated-ssrf-via-oembed-endpoint",
        "https://github.com/chaskiq/chaskiq",
        "https://github.com/chaskiq/chaskiq/blob/2.0.3/app/controllers/oembed_controller.rb#L8-L11",
        "https://github.com/chaskiq/chaskiq/blob/2.0.3/app/services/fetch_link_card_service.rb#L11-L40"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111662.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-111662",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492109,
  "published_at": "2026-10-16T17:39:26.219+00:00"
}