Auth bypass in Flintsh Flare
CVE-2026-30231
Flare is a Next.js-based, self-hostable file sharing platform that integrates with screenshot tools. Prior to version 1.7.2, the raw and direct file routes only block unauthenticated users from accessing private files. Any authenticated, non‑owner user who knows the file URL can retrieve the content, which is inconsistent with stricter checks used by other endpoints. 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 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Flintsh Flare — versions < 1.7.2
Weakness classification (CWE)
References
- github.com/FlintSH/Flare/security/advisories/GHSA-gwqr-xf5c-5569 (Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-30231?
- CVE-2026-30231 is a medium-severity vulnerability in Flintsh Flare, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.3/10. Published 2026-03-06.
- How severe is CVE-2026-30231?
- Medium severity. CVSS v3 base score is 5.3 out of 10.