CVE-2026-26993CWE-79

Flare has XSS vulnerability in Raw File Preview

Medium · published February 20, 2026

CVSS v3.1
4.6
EPSS
0%
Percentile
35.4
In the wild
Unconfirmed
What it is

Flare is a Next.js-based, self-hostable file sharing platform that integrates with screenshot tools. Versions 1.7.0 and below allow users to upload files without proper content validation or sanitization. By embedding malicious JavaScript within an SVG (or other active content formats such as HTML or XML), an attacker can achieve script execution in the context of the application's origin when a victim views the file in “raw” mode. This results in a stored Cross-Site Scripting (XSS) vulnerability that can be exploited to exfiltrate user data. This issue has been fixed in version 1.7.1.

The record
Technical detail
CVSS v3.1
4.6 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00422 · 35.4th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-02-20T02:33Z
EPSS history
Timeline
  • 20 FEB 02:33Z
    Flare has XSS vulnerability in Raw File Preview
    cvelistv5