{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:shaneisrael:fireshare:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.5.3"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "b76915607924756e6fa1a5f6c8823c38d611fb24"
            }
          ],
          "repo": "https://github.com/shaneisrael/fireshare",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-fvvp-rj8g-c7gc"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34745.json"
  },
  "details": "Fireshare facilitates self-hosted media and link sharing. Prior to version 1.5.3, the fix for CVE-2026-33645 was applied to the authenticated /api/uploadChunked endpoint but was not applied to the unauthenticated /api/uploadChunked/public endpoint in the same file (app/server/fireshare/api.py). An unauthenticated attacker can exploit the checkSum parameter to write arbitrary files with attacker-controlled content to any writable path on the server filesystem. This issue has been patched in version 1.5.3.",
  "id": "CVE-2026-34745",
  "modified": "2026-07-27T03:56:13.069594590Z",
  "published": "2026-04-02T18:38:17.626Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ShaneIsrael/fireshare/releases/tag/v1.5.3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34745.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ShaneIsrael/fireshare/security/advisories/GHSA-fvvp-rj8g-c7gc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34745"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ShaneIsrael/fireshare/commit/b76915607924756e6fa1a5f6c8823c38d611fb24"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ShaneIsrael/fireshare/pull/520"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Unauthenticated Path Traversal Arbitrary File Write in /api/uploadChunked/public"
}