CVE-2026-26993

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.

• CWE-79

• https://github.com/FlintSH/Flare/commit/7763d7b954799552f287ab9260bb1353f8880163Patch
• https://github.com/FlintSH/Flare/releases/tag/v1.7.1Product, Release Notes
• https://github.com/FlintSH/Flare/security/advisories/GHSA-q8fp-w6m5-4gjmExploit, Vendor Advisory

Published

Feb 20, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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