PT-2026-29874 · Shaneisrael · Fireshare

Axel-Corsiez · Published 2026-04-02 · Updated 2026-04-02 · CVE-2026-34745

NVD

CVSS v3.1

9.1

Critical

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

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.

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2026-34745

Affected Products

Fireshare

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-34745 · Security Note
• https://github.com/ShaneIsrael/fireshare/releases/tag/v1.5.3 · Note
• https://github.com/ShaneIsrael/fireshare/pull/520 · Note
• https://github.com/ShaneIsrael/fireshare/commit/b76915607924756e6fa1a5f6c8823c38d611fb24 · Note
• https://github.com/ShaneIsrael/fireshare/security/advisories/GHSA-fvvp-rj8g-c7gc · Note