Streambert: Arbitrary Directory Creation and File Manipulation via Backup Handler

{
  "id": "75b7f7bb9d3b67b525a81f8b67fcf598a7d259aae10f154eb5c02985a228e487",
  "url": "https://osv.dev/vulnerability/CVE-2026-52875",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Streambert: Arbitrary Directory Creation and File Manipulation via Backup Handler",
    "summary": "Streambert is a cross-platform Electron Desktop App to stream and download video content. Prior to 2.6.0, the perform-scheduled-backup IPC handler in src/ipc/storage.js takes settings.path from a renderer-supplied object and uses the resulting directory for fs.mkdirSync, fs.writeFileSync, fs.readdirSync, and fs.unlinkSync operations without checking that it is inside an authorized backup location. A compromised renderer can choose an absolute path or a relative traversal path to create directories and write a streambert-backup-[timestamp].json file containing renderer-controlled data. The pruning loop can also delete files in that directory whose names begin with streambert-backup- and end with .json. This vulnerability is fixed in 2.6.0.",
    "evidence": "osv:CVE-2026-52875",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-52875",
      "aliases": [
        "CVE-2026-52875",
        "GHSA-c64m-cx97-6rc9"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/truelockmc/streambert",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "9ab0f9d8ddc29c316a6084cad19c4f76df908251"
                },
                {
                  "fixed": "43566ed031183b046675761c9813c5379b619269"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.6.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "43566ed031183b046675761c9813c5379b619269"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.5.0",
            "2.4",
            "v.2.3.0",
            "2.3",
            "2.2.1",
            "2.2",
            "2.1",
            "2.0",
            "1.7",
            "1.6",
            "1.5",
            "1.4",
            "1.3",
            "1.2",
            "1.1",
            "1.0",
            "0.3.0",
            "0.2.1",
            "0.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52875.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:28.901759373Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52875.json",
        "https://github.com/truelockmc/streambert/security/advisories/GHSA-c64m-cx97-6rc9",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-52875",
        "https://github.com/truelockmc/streambert/pull/149"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22",
          "CWE-73"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52875.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-52875",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 495847,
  "published_at": "2026-08-18T21:30:48.37+00:00"
}