Is CVE-2026-34745 actively exploited?

No active exploitation of CVE-2026-34745 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-34745 be exploited remotely?

Yes. CVE-2026-34745 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-34745?

CVE-2026-34745 has a CVSS score of 9.1 (CRITICAL).

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CRITICAL

CVE-2026-34745

CWE-22Published: April 2, 2026· Updated: Apr 3, 2026

9.1

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:13.3th

Official 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.

NVD Source

Technical Analysis

CVE-2026-34745 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.1.