Actively exploited · Published May 26, 2026 · Assigned by VulnCheck
CVE-2026-45247Mirasvit Cache Warmer for Magento < 1.11.12 PHP Object Injection
Critical 9.8 Exploited
In plain English
A critical-severity unsafe deserialization in Full Page Cache Warmer for Magento 2 from Mirasvit. Attackers are actively exploiting it in the wild (listed by CISA on June 3, 2026). The chance it is exploited in the next 30 days is estimated at 26.2% (higher than 98% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA guidance
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Federal agencies must remediate by Jun 6, 2026.
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mirasvit | Full Page Cache Warmer for Magento 2 | 0 – before 1.11.12 |
Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://sansec.io/research/mirasvit-cache-warmer-object-injection technical-description
- https://mirasvit.com/package/changelog/?package=mirasvit/module-cache-warmer release-notes, patch
- https://www.vulncheck.com/advisories/mirasvit-cache-warmer-for-magento-php-object-injection third-party-advisory
- https://www.imperva.com/blog/imperva-customers-protected-against-cve-2026-45247-in-mirasvit-full-page-cache-warmer-for-magento/ media-coverage
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-45247 government-resource