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CVE-2026-22659

8.1 · HIGH

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 c…

Published Jul 10, 2026CWE-863EPSS 0.53%

Overview

CVE-2026-22659 is a high-severity vulnerability. It was published on July 10, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/flaskbb/flaskbb/commit/acc88cfedd011124395e0101cb27432a47f712beGitHubgithub.com/flaskbb/flaskbb/security/advisories/GHSA-9rjj-9p2h-6c55Refwww.vulncheck.com/advisories/flaskbb-authorization-bypass-via-topic-id-manipulationGitHubgithub.com/flaskbb/flaskbb/security/advisories/GHSA-9rjj-9p2h-6c55

How CyberStrike helps

Frequently asked questions

What is CVE-2026-22659?

CVE-2026-22659 is a high-severity vulnerability. It was published on July 10, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-22659?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-22659?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-22659?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-22659 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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