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.
History

Fri, 03 Apr 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Shaneisrael
Shaneisrael fireshare
Vendors & Products Shaneisrael
Shaneisrael fireshare

Thu, 02 Apr 2026 20:30:00 +0000

Type Values Removed Values Added
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.
Title Unauthenticated Path Traversal Arbitrary File Write in /api/uploadChunked/public
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-04-02T18:38:17.626Z

Updated: 2026-04-02T19:15:43.377Z

Reserved: 2026-03-30T19:17:10.224Z

Link: CVE-2026-34745

cve-icon Vulnrichment

Updated: 2026-04-02T19:15:39.896Z

cve-icon NVD

Status : Received

Published: 2026-04-02T19:21:33.340

Modified: 2026-04-02T19:21:33.340

Link: CVE-2026-34745

cve-icon Redhat

No data.