PT-2026-57162 · Flaskbb · Flaskbb

Hamed Kohi + 1 · Published 2026-07-10 · Updated 2026-07-10 · CVE-2026-22659

NVD

CVSS v3.1

8.1

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

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 lists. Attackers can include a low-ID topic from a permitted forum as an anchor in a batch request, causing the permission check applied only to the first result to pass, and then execute lock, unlock, delete, or hide actions against topics in unmoderated forums.

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2026-22659

Affected Products

Flaskbb

References · 4

• https://github.com/flaskbb/flaskbb/commit/acc88cfedd011124395e0101cb27432a47f712be · Patch
• https://github.com/flaskbb/flaskbb/security/advisories/GHSA-9rjj-9p2h-6c55 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-22659 · Security Note
• https://vulncheck.com/advisories/flaskbb-authorization-bypass-via-topic-id-manipulation · Note