Actively exploited vulnerability

CVE-2026-45247: Mirasvit Full Page Cache Warmer Deserialization of Untrusted Data Vulnerability

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.

CISA KEV source 3 Jun 2026 added 6 Jun 2026 remediation due

Affected product

Mirasvit · Mirasvit Full Page Cache Warmer

Known ransomware use: Unknown

Required action

Follow the source advisory and validate exposure in your environment.

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Related Yasna coverage

Recent reporting that mentions CVE-2026-45247.

Security Affairs5 Jun 2026

U.S. CISA adds Mirasvit Full Page Cache Warmer flaw to its Known Exploited Vulnerabilities catalog

U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Mirasvit Full Page Cache Warmer flaw to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added Mirasvit Full Page Cache Warmer flaw, tracked as CVE-2026-45247 (CVSS ver 4.0 score of 9.3), to its Known Exploited Vulnerabilities (KEV) catalog. The CVE-2026-45247 flaw is a […]

The Hacker News4 Jun 2026

CISA Adds Exploited Magento RCE Flaw CVE-2026-45247 to KEV Catalog

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Wednesday added a critical flaw impacting Mirasvit Cache Warmer, a popular Magento full-page cache extension, to its Known Exploited Vulnerabilities (KEV) catalog, following reports of active exploitation in the wild