Gotenberg: Server-Side Request Forgery (SSRF) in github.com/gotenberg/gotenberg/v8

{
  "id": "63fbb1b2b478b75f5e692f28eec2aad47f4d673f28d41f36f14b8f2026ddd284",
  "url": "https://osv.dev/vulnerability/CVE-2026-42591",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Gotenberg: Server-Side Request Forgery (SSRF) in github.com/gotenberg/gotenberg/v8",
    "summary": "Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.32.0, the LibreOffice conversion endpoint (/forms/libreoffice/convert) passes uploaded documents directly to LibreOffice without inspecting their content. LibreOffice then fetches any embedded external URLs on its own, completely bypassing the SSRF filters. This vulnerability is fixed in 8.32.0.",
    "evidence": "osv:CVE-2026-42591",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-42591",
      "aliases": [
        "CVE-2026-42591",
        "GHSA-rm4c-xj6x-49mw",
        "GO-2026-5627"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/gotenberg/gotenberg",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "fe1b0020b8f211575559e6cf7e5ef6cc5a0545ca"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "8.32.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:thecodingmachine:gotenberg:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "8.32.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v8.31.0",
            "v8.30.1",
            "v8.30.0",
            "v8.29.1",
            "v8.29.0",
            "v8.28.0",
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42591.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.344102033Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42591.json",
        "https://github.com/gotenberg/gotenberg/security/advisories/GHSA-rm4c-xj6x-49mw",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-42591"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42591.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-42591",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 522193,
  "published_at": "2026-05-14T15:20:43.764+00:00"
}