CVE-2026-26993

MEDIUM

4.6

Description

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.

CVE Details

CVSS v3.1 Score4.6

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionREQUIRED

Published2/20/2026

Last Modified3/3/2026

Sourcenvd

Honeypot Sightings0

Affected Products

flintsh:flare

Weaknesses (CWE)

CWE-79

References

https://github.com/FlintSH/Flare/commit/7763d7b954799552f287ab9260bb1353f8880163(security-advisories@github.com)

https://github.com/FlintSH/Flare/releases/tag/v1.7.1(security-advisories@github.com)

https://github.com/FlintSH/Flare/security/advisories/GHSA-q8fp-w6m5-4gjm(security-advisories@github.com)

IOC Correlations

No correlations recorded

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