CVE-2026-22660

FlaskBB through 2.2.0, fixed in commit a5da9a5, contains a logic flaw vulnerability that allows authenticated administrators to delete all built-in authorization groups by exploiting a type mismatch in the bulk delete protection check. The bulk AJAX endpoint in the management views compares received JSON integer group IDs against string literals, causing the protection check to always pass, which allows deletion of all six built-in groups and destroys the forum's permission model, potentially rendering the site unusable.

CVSS v3 7.2 HIGH

7.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/flaskbb/flaskbb/commit/a5da9a529adddc65fe31e275192b642a4e32de64
https://github.com/flaskbb/flaskbb/security/advisories/GHSA-r9cf-jxr6-5h3r
https://www.vulncheck.com/advisories/flaskbb-logic-flaw-authorization-group-deletion-via-bulk-ajax-endpoint
https://github.com/flaskbb/flaskbb/security/advisories/GHSA-r9cf-jxr6-5h3r

Configurations

No configuration.

History

10 Jul 2026, 15:16

Type	Values Removed	Values Added
References	~~() https://github.com/flaskbb/flaskbb/security/advisories/GHSA-r9cf-jxr6-5h3r -~~	() https://github.com/flaskbb/flaskbb/security/advisories/GHSA-r9cf-jxr6-5h3r -

10 Jul 2026, 14:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-10 14:16

Updated : 2026-07-14 16:16

NVD link : CVE-2026-22660

Mitre link : CVE-2026-22660

CVE.ORG link : CVE-2026-22660

JSON object : View

Products Affected

No product.

CWE

CWE-697

Incorrect Comparison

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