Vulnerability · Published Mar 6, 2026 · Assigned by GitHub_M

CVE-2026-30230Flare: Password‑Protected Thumbnail Bypass

High 8.2

In plain English

A high-severity authorization bypass via user-controlled key in Flare from FlintSH. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities).

Severity (CVSS 4.0)8.2High

Exploit odds (30 days)0.4%top 64.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Flare is a Next.js-based, self-hostable file sharing platform that integrates with screenshot tools. Prior to version 1.7.2, the thumbnail endpoint does not validate the password for password‑protected files. It checks ownership/admin for private files but skips password verification, allowing thumbnail access without the password. This issue has been patched in version 1.7.2.

Affected products (as reported)

Vendor	Product	Versions
FlintSH	Flare	< 1.7.2

Weakness: CWE-639 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

References

https://github.com/FlintSH/Flare/security/advisories/GHSA-3x7v-x3r6-mjh7 x_refsource_CONFIRM