CVE-2026-45247

What is CVE-2026-45247?

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.

Timeline

• 2026-05-26Published to the U.S. National Vulnerability Database (NVD)
• 2026-06-03Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
• 2026-06-06CISA federal remediation deadline (BOD 22-01)
• 2026-07-24NVD record last updated

CISA Known Exploited Vulnerability

Mirasvit Full Page Cache Warmer Deserialization of Untrusted Data Vulnerability

Affected product

Mirasvit Full Page Cache Warmer

References

• https://sansec.io/research/mirasvit-cache-warmer-object-injection
• https://www.vulncheck.com/advisories/mirasvit-cache-warmer-for-magento-php-object-injection
• https://www.imperva.com/blog/imperva-customers-protected-against-cve-2026-45247-in-mirasvit-full-page-cache-warmer-for-magento/
• https://nvd.nist.gov/vuln/detail/CVE-2026-45247
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog

Referenced in our briefings & reports

• Vulnerability Priority Report – Week 5 of June 2026 (June 29 – July 5)
• Vulnerability Priority Report – Week 4 of June 2026 (June 22 – 28)
• Vulnerability Priority Report – Week 3 of June 2026 (June 15 – 21)
• Vulnerability Priority Report – Week 2 of June 2026 (June 8 – 14)
• Vulnerability Priority Report – Week 1 of June 2026 (June 1 – 7)