CVE-2026-54337

Fireshare has Unauthenticated Argument Injection to Arbitrary File Write/Overwrite

CRITICAL

9.8

CVSS Score

Published: September 15, 2026 at 08:22 PM UTC

Updated: September 30, 2026 at 05:51 PM UTC

1 product affected across 1 vendorFireshare

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Severity

CRITICAL9.8

Exploit prediction

EPSS 0.6%

SSVC

No known exploit

Description

Fireshare facilitates self-hosted media and link sharing. Prior to version 1.6.14, an argument Injection in the video upload function allows unauthenticated attacker to write/overwrite system files. Version 1.6.14 fixes the issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fireshare · Shaneisrael

60%

v < 1.6.14

Affected range stops below 1.6.14, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_CONFIRM

Source: cverecord

https://github.com/ShaneIsrael/fireshare/security/advisories/GHSA-hmh2-6g84-q8jx

SSVC — Action Prioritization

SSVCNo known exploitAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICALGitHub_M

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-88

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