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.
CVE-2026-22660
HIGHPre-NVD 7.27.2Elevated
EchelonGraph scoreLOW confidence
This high-severity CVE scores 7.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: secondary
7.2
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: —CVSS: 7.2Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.2
- EG Score
- 7.2(low)
- EPSS
- —
- KEV
- Not listed
Published
July 10, 2026
Last Modified
July 10, 2026
Advisory Details (3)
Auto-updated Jul 10, 2026🔬 Proof of concept available. Patch available. Sources: github_commit, github.
generic
FlaskBB Logic Flaw Authorization Group Deletion via Bulk AJAX Endpoint | Advisories | VulnCheck
https://www.vulncheck.com/advisories/flaskbb-logic-flaw-authorization-group-deletion-via-bulk-ajax-endpointgithub Patch Available🟡 PoC Available
FlaskBB Bulk Group Deletion Bypass via Type Mismatch in Standard Group Protection · Advisory · flaskbb/flaskbb · GitHub
https://github.com/flaskbb/flaskbb/security/advisories/GHSA-r9cf-jxr6-5h3rgithub_commit Patch Available
commit a5da9a529add (flaskbb/flaskbb)
Patch available: flaskbb/flaskbb v2.2.1 (contains commit a5da9a529add)
https://github.com/flaskbb/flaskbb/commit/a5da9a529adddc65fe31e275192b642a4e32de64Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 4× in last 7d / 4× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-11 15:30 UTCEG score recompute
- 2026-07-11 02:38 UTCEG score recompute
- 2026-07-10 13:48 UTCEG score recompute
- 2026-07-10 13:47 UTCMITRE cvelistV5first tracked
Frequently asked(4)
What is CVE-2026-22660?
CVE-2026-22660 is a high vulnerability published on July 10, 2026. 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…
When was CVE-2026-22660 disclosed?
CVE-2026-22660 was first published in the National Vulnerability Database on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-22660?
CVE-2026-22660 has a CVSS v3 base score of 7.2 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-22660?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-22660, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-22660
Is Your Infrastructure Affected by CVE-2026-22660?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.