CVE-2026-27384: Boldgrid w3 Total Cache

Critical severity, CVSS 9.0. EPSS: 0.4% chance of exploitation in the next 30 days.

Improper Validation of Specified Quantity in Input vulnerability in BoldGrid W3 Total Cache w3-total-cache allows Accessing Functionality Not Properly Constrained by ACLs.This issue affects W3 Total Cache: from n/a through <= 2.9.1.

Affected products

• Boldgrid w3 Total Cache: up to and including 2.9.1

Published 2026-03-05. Last modified 2026-06-17.