What is CVE-2026-54337?

CVE-2026-54337 is a critical-severity vulnerability in Shaneisrael Fireshare, classified under Argument Injection. CVSS score: 9.8/10. Published 2026-09-15.

How severe is CVE-2026-54337?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Shaneisrael Fireshare

CVE-2026-54337

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.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Shaneisrael Fireshare — versions < 1.6.14

Weakness classification (CWE)

CWE-88 — Argument Injection

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-54337?: CVE-2026-54337 is a critical-severity vulnerability in Shaneisrael Fireshare, classified under Argument Injection. CVSS score: 9.8/10. Published 2026-09-15.
How severe is CVE-2026-54337?: Critical severity. CVSS v3 base score is 9.8 out of 10.