Security advisory

{
  "id": "d1c5f903b59aa690cf13929e909203b3ff28528fac0a1ed647d12e7336cfc093",
  "url": "https://osv.dev/vulnerability/CVE-2025-11849",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2025-11849",
    "summary": "Versions of the package mammoth from 0.3.25 and before 1.11.0; versions of the package mammoth from 0.3.25 and before 1.11.0; versions of the package mammoth before 1.11.0; versions of the package org.zwobble.mammoth:mammoth before 1.11.0 are vulnerable to Directory Traversal due to the lack of path or file type validation when processing a docx file containing an image with an external link (r:link attribute instead of embedded r:embed). The library resolves the URI to a file path and after reading, the content is encoded as base64 and included in the HTML output as a data URI. An attacker can read arbitrary files on the system where the conversion is performed or cause an excessive resources consumption by crafting a docx file that links to special device files such as /dev/random or /dev/zero.",
    "evidence": "osv:CVE-2025-11849",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-11849",
      "aliases": [
        "CVE-2025-11849",
        "GHSA-rmjr-87wv-gf87",
        "PYSEC-2026-1603"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:N/SA:H/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mwilliamson/mammoth.js",
              "type": "GIT",
              "events": [
                {
                  "introduced": "d73dce45a781a15e18a953a3507fb3ccd740ed89"
                },
                {
                  "fixed": "3261fbb689a2d54c151d6be7fa653553735e5861"
                },
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3261fbb689a2d54c151d6be7fa653553735e5861"
                },
                {
                  "fixed": "c54aaeb43a7941317c1f3c119ffa92090f988820"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.3.25"
                      },
                      {
                        "fixed": "1.11.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.11.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c54aaeb43a7941317c1f3c119ffa92090f988820"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.10.0",
            "1.9.1",
            "1.9.0",
            "1.8.0",
            "1.7.2",
            "1.7.1",
            "1.7.0",
            "1.6.0",
            "1.5.1",
            "1.5.0",
            "1.4.21",
            "1.4.20",
            "1.4.19",
            "1.4.18",
            "1.4.17",
            "1.4.16",
            "1.4.15",
            "1.4.14",
            "1.4.13",
            "1.4.12",
            "1.4.11",
            "1.4.10",
            "1.4.9",
            "1.4.8",
            "1.4.7",
            "1.4.6",
            "1.4.5",
            "1.4.4",
            "1.4.3",
            "1.4.2",
            "1.4.1",
            "1.4.0",
            "1.3.6",
            "1.3.5",
            "1.3.4",
            "1.3.3",
            "1.3.2",
            "1.3.1",
            "1.3.0",
            "1.2.5",
            "1.2.4",
            "1.2.3",
            "1.2.2",
            "1.2.1",
            "1.2.0",
            "1.0.4",
            "1.0.3",
            "1.0.2",
            "1.0.1",
            "1.0.0",
            "0.3.33",
            "0.3.32",
            "0.3.31",
            "0.3.30",
            "0.3.29",
            "0.3.28",
            "0.3.28-pre.1",
            "0.3.27",
            "0.3.26",
            "0.3.25"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-11849.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:27.669563662Z",
      "provider": "osv",
      "references": [
        "https://gist.github.com/AudunWA/4d690d9ae5efdafe7cf71d9c2ee90a10",
        "https://security.snyk.io/vuln/SNYK-DOTNET-MAMMOTH-13561968",
        "https://security.snyk.io/vuln/SNYK-JAVA-ORGZWOBBLEMAMMOTH-13561969",
        "https://security.snyk.io/vuln/SNYK-JS-MAMMOTH-13554470",
        "https://security.snyk.io/vuln/SNYK-PYTHON-MAMMOTH-13561967",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/11xxx/CVE-2025-11849.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-11849",
        "https://github.com/mwilliamson/mammoth.js/commit/c54aaeb43a7941317c1f3c119ffa92090f988820"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22"
        ],
        "cna_assigner": "snyk",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/11xxx/CVE-2025-11849.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-11849",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 494440,
  "published_at": "2025-10-17T05:00:06.278+00:00"
}