Vulnerability Description
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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Shaneisrael | Fireshare | < 1.5.3 |
Related Weaknesses (CWE)
References
- https://github.com/ShaneIsrael/fireshare/commit/b76915607924756e6fa1a5f6c8823c38Patch
- https://github.com/ShaneIsrael/fireshare/pull/520Issue TrackingPatch
- https://github.com/ShaneIsrael/fireshare/releases/tag/v1.5.3Release Notes
- https://github.com/ShaneIsrael/fireshare/security/advisories/GHSA-fvvp-rj8g-c7gcExploitMitigationVendor Advisory
FAQ
What is CVE-2026-34745?
CVE-2026-34745 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 una...
How severe is CVE-2026-34745?
CVE-2026-34745 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-34745?
Check the references section above for vendor advisories and patch information. Affected products include: Shaneisrael Fireshare.