Vulnerability · Published Sep 15, 2026 · Assigned by GitHub_M
CVE-2026-54337Fireshare has Unauthenticated Argument Injection to Arbitrary File Write/Overwrite
Critical 9.8
In plain English
A critical-severity argument injection in fireshare from ShaneIsrael. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.6%top 49.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official 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 products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ShaneIsrael | fireshare | < 1.6.14 |
Weakness: CWE-88 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/ShaneIsrael/fireshare/security/advisories/GHSA-hmh2-6g84-q8jx x_refsource_CONFIRM