Alerts
Critical Vulnerability in Mirasvit Full Page Cache Warmer for Magento 2
5 June 2026
Mirasvit released a security update addressing a critical vulnerability in the Full Page Cache Warmer extension for Magento 2. Users and administrators of affected products are advised to update to the latest versions immediately.
Mirasvit is the product owner of Magento 2, an e-commerce platform. Mirasvit released a security update to address a critical PHP object injection vulnerability (CVE-2026-45247) affecting the Mirasvit Full Page Cache Warmer extension for Magento 2. This vulnerability has a Common Vulnerability Scoring System (CVSS v3.1) score of 9.8 out of 10.
Impact
Due to unsafe deserialisation of attacker-controlled data supplied through the CacheWarmer cookie, an unauthenticated attacker could inject a crafted serialised PHP object to perform remote code execution on the affected system.
Known Exploitation
This vulnerability is being actively exploited in the wild.
Affected Products
This vulnerability affects Mirasvit Full Page Cache Warmer for Magento 2 versions prior to 1.11.12.
Mitigation
Users and administrators of affected products are advised to update to the latest versions immediately.
References
https://mirasvit.com/package/changelog/?package=mirasvit/module-cache-warmer
https://nvd.nist.gov/vuln/detail/CVE-2026-45247
https://www.securityweek.com/mirasvit-vulnerability-exploited-to-execute-code-on-magento-servers/