Mirasvit Full Page Cache Warmer Deserialization of Untrusted Data Vulnerability
Mirasvit — Full Page Cache Warmer for Magento 2
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.
9.3
27.5%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- None
- User interaction
- None
- Confidentiality (Vulnerable System)
- High
- Integrity (Vulnerable System)
- High
- Availability (Vulnerable System)
- High
- Confidentiality (Subsequent System)
- None
- Integrity (Subsequent System)
- None
- Availability (Subsequent System)
- None
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Published
- May 26, 2026
- Modified
- Jun 4, 2026
- Added to KEV
- Jun 3, 2026
- Federal patch due
- Jun 6, 2026
CISA 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.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2026-45247, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2026-45247 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
Frequently asked questions
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.
How severe is CVE-2026-45247?
CVE-2026-45247 has a CVSS base score of 9.3 out of 10 (CVSS 4.0).
Is CVE-2026-45247 actively exploited in the wild?
Yes. CVE-2026-45247 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Jun 3, 2026, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2026-45247?
27.5% - meaning FIRST.org's EPSS model estimates a 27.5% probability this vulnerability will be exploited in the wild within 30 days (98% percentile among all scored CVEs).
What type of vulnerability is CVE-2026-45247?
CVE-2026-45247 is classified under CWE-502 (Deserialization of Untrusted Data).
Cross-checked against
Impactr finds and proves whether CVE-2026-45247 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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