CVE-2026-34745CRITICAL 9.1EPSS p45.0%

CVE-2026-34745CVE-2026-34745

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.

Scoring

CVSS 3.19.1 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
EPSS0.62% probability of exploitation · percentile 45.0% · 2026-06-19T12:03:05Z
Published2026-04-02
Last modified2026-04-03

Underlying weaknesses· 1

CWE-22

References

  1. https://github.com/ShaneIsrael/fireshare/commit/b76915607924756e6fa1a5f6c8823c38d611fb24
  2. https://github.com/ShaneIsrael/fireshare/pull/520
  3. https://github.com/ShaneIsrael/fireshare/releases/tag/v1.5.3
  4. https://github.com/ShaneIsrael/fireshare/security/advisories/GHSA-fvvp-rj8g-c7gc

1

TypeTargetConfidenceTier
WeaknessImproper Limitation of a Pathname to a Restricted Directory ('Path Traversal')cwe-220%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
CVE-2026-33645
CVE
CVE-2025-67728
CVE
CVE-2026-36760
CVE
CVE-2026-36762
CVE
CVE-2026-33329
CVE
CVE-2025-61506
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.