What is CVE-2026-22659?

CVE-2026-22659 is a high-severity vulnerability in Flaskbb, classified under Incorrect Authorization. CVSS score: 8.1/10. Published 2026-07-10.

How severe is CVE-2026-22659?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Flaskbb

CVE-2026-22659

FlaskBB through 2.2.0, fixed in commit acc88cf, contains an authorization bypass vulnerability that allows authenticated moderators to perform unauthorized actions on topics in forums they do not control by submitting crafted topic ID list…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

Affected products

Flaskbb — versions 0, https://github.com/flaskbb/flaskbb/commit/a5da9a52

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-22659?: CVE-2026-22659 is a high-severity vulnerability in Flaskbb, classified under Incorrect Authorization. CVSS score: 8.1/10. Published 2026-07-10.
How severe is CVE-2026-22659?: High severity. CVSS v3 base score is 8.1 out of 10.