Hugging Face Transformers Path Traversal via Checkpoint Index

{
  "id": "9d07bda543a6e24513cff1fd843a570a2e56ebe3b0a1f5566d97389521cb46c0",
  "url": "https://osv.dev/vulnerability/CVE-2026-75104",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Hugging Face Transformers Path Traversal via Checkpoint Index",
    "summary": "Hugging Face Transformers fails to validate shard filenames in checkpoint index files, allowing attackers to read arbitrary files outside the model directory. Attackers can supply malicious index files with parent-directory references or absolute paths that are joined without validation, enabling file disclosure and filesystem reconnaissance.",
    "evidence": "osv:CVE-2026-75104",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-75104",
      "aliases": [
        "CVE-2026-75104"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/huggingface/transformers",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "5eddc12edfaf8cafde8c9bae4ccb12f8a139b4f9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "5.15.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
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          "versions": [
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            "v4.49.0-SigLIP-2",
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75104.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.816215108Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75104.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-75104",
        "https://www.vulncheck.com/advisories/hugging-face-transformers-path-traversal-via-checkpoint-index",
        "https://github.com/huggingface/transformers/issues/47176",
        "https://github.com/huggingface/transformers/issues/47177",
        "https://github.com/huggingface/transformers",
        "https://github.com/huggingface/transformers/blob/main/src/transformers/utils/hub.py"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75104.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-75104",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504340,
  "published_at": "2026-08-17T20:36:00.721+00:00"
}