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.

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)

EPSS: 0.003 (20.6th percentile) — read the EPSS interpretation.

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.

Affected products

Flintsh Flare — versions < 1.7.2

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

security-advisories@github.com (x_refsource_CONFIRM, 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.