CVE-2026-45247
Published 2026-05-26 · Updated 2026-07-24 · Source disclosure@vulncheck.com
Summary
CVE-2026-45247 is a critical-severity (CVSS 9.8) vulnerability in Mirasvit Mirasvit Full Page Cache Warmer. CISA added it to the Known Exploited Vulnerabilities catalog on June 3, 2026, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by June 6, 2026. CISA does not currently list it as used in ransomware campaigns.
All 1 known-exploited Mirasvit vulnerabilities →Description
Mirasvit Full Page Cache Warmer for Magento 2 before version 1.11.12 contains a PHP object injection vulnerability that allows unauthenticated attackers to achieve remote code execution by supplying a crafted serialized PHP object in the CacheWarmer cookie. Attackers can exploit the unrestricted call to PHP's native unserialize() function combined with gadget chains available in Magento and its dependencies to execute arbitrary code on the server.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: Mirasvit — Mirasvit Full Page Cache Warmer
Name: Mirasvit Full Page Cache Warmer Deserialization of Untrusted Data Vulnerability
Date added: 2026-06-03 · Due: 2026-06-06
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
References
- https://mirasvit.com/package/changelog/?package=mirasvit/module-cache-warmer
- https://sansec.io/research/mirasvit-cache-warmer-object-injection
- https://www.vulncheck.com/advisories/mirasvit-cache-warmer-for-magento-php-object-injection
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-45247
- https://www.imperva.com/blog/imperva-customers-protected-against-cve-2026-45247-in-mirasvit-full-page-cache-warmer-for-magento/