Auth bypass in Flintsh Flare
CVE-2026-30230
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Flintsh Flare — versions < 1.7.2
Weakness classification (CWE)
References
- github.com/FlintSH/Flare/security/advisories/GHSA-3x7v-x3r6-mjh7 (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-30230?
- CVE-2026-30230 is a high-severity vulnerability in Flintsh Flare, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.5/10. Published 2026-03-06.
- How severe is CVE-2026-30230?
- High severity. CVSS v3 base score is 7.5 out of 10.