CVE-2026-34745
Critical · 9.1CVSS
9.1
EPSS
0.7%
Published
Apr 2, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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