SillyTavern: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

{
  "id": "0532ea60e8806d56fbdbf9dd4d02258c03f2ea7dd924c85d56522d26c29da4f7",
  "url": "https://osv.dev/vulnerability/CVE-2026-44650",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "SillyTavern: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
    "summary": "SillyTavern is a locally installed user interface that allows users to interact with text generation large language models, image generation engines, and text-to-speech voice models. Prior to 1.18.0, POST /api/extensions/delete endpoint accepts extensionName: \".\" which bypasses sanitize-filename validation, causing the entire user extensions directory to be recursively deleted. No authentication is required in the default configuration. This vulnerability is fixed in 1.18.0.",
    "evidence": "osv:CVE-2026-44650",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-44650",
      "aliases": [
        "CVE-2026-44650",
        "GHSA-886q-f44j-h6wh"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/sillytavern/sillytavern",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "51ad27fb86d39a3daca3adaa970375c9670c12df"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.18.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.18.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.17.0",
            "1.16.0",
            "1.15.0",
            "1.14.0",
            "1.13.5",
            "1.13.4",
            "1.13.3",
            "1.13.2",
            "1.13.1",
            "1.13.0",
            "1.12.14",
            "1.12.13",
            "1.12.12",
            "1.12.11",
            "1.12.10",
            "1.12.9",
            "1.12.8",
            "1.12.7",
            "1.12.6",
            "1.12.5",
            "1.12.4",
            "1.12.3",
            "1.12.2",
            "1.12.1",
            "1.12.0-6",
            "1.12.0",
            "1.11.8",
            "1.11.7",
            "1.11.6",
            "1.11.5",
            "1.11.4-1",
            "1.11.4",
            "1.11.3",
            "1.11.2",
            "1.11.1",
            "1.11.0",
            "1.10.10",
            "1.10.9",
            "1.10.8",
            "1.10.7",
            "1.10.6",
            "1.10.5",
            "1.10.4",
            "1.10.3",
            "1.10.2",
            "1.10.1",
            "1.10.0",
            "1.9.7",
            "1.9.6",
            "1.9.5",
            "1.9.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44650.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:40.339208141Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44650.json",
        "https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-886q-f44j-h6wh",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-44650"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44650.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-44650",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 508071,
  "published_at": "2026-05-29T17:48:03.396+00:00"
}