Mirasvit Full Page Cache Warmer Deserialization of Untrusted Data Vulnerability
Known exploited
CVE-2026-45247
Summary
Mirasvit Full Page Cache Warmer contains a deserialization of untrusted data vulnerability that could allow unauthenticated attackers to achieve remote code execution by supplying a crafted serialized PHP object in the CacheWarmer cookie.
Why it matters
CVE-2026-45247 is listed in CISA's Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. CISA remediation deadline: 2026-06-06. Treat remediation as urgent.
Operator check
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.