Known exploited vulnerability
CVE-2026-45247
The short answer
CVE-2026-45247 affects Mirasvit Full Page Cache Warmer for Magento 2 and is rated critical (CVSS 9.3). CISA added it to the Known Exploited Vulnerabilities catalog on 2026-06-03: attackers are using it, so patch it first.
What it is
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.
Weakness: CWE-502.
Severity
9.3 critical
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Exploited (CISA KEV)
Yes, since Jun 3, 2026
Federal due date Jun 6, 2026
EPSS, next 30 days
26%
Higher than 98% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- None
- User interaction
- None
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected products
Full Page Cache Warmer for Magento 2. NVD's record lists the exact affected versions.
References
- mirasvit.com/package/changelog/?package=mirasvit/module-cache-warmer Release Notes
- sansec.io/research/mirasvit-cache-warmer-object-injection Third Party Advisory
- www.vulncheck.com/advisories/mirasvit-cache-warmer-for-magento-php-object-injection Third Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-45247 US Government Resource
- www.imperva.com/blog/imperva-customers-protected-against-cve-2026-45247-in-mirasvit-full-page-cache-warmer-for-magento/ Third Party Advisory
Questions
Is CVE-2026-45247 being exploited?
Yes. CISA added CVE-2026-45247 to its Known Exploited Vulnerabilities catalog on 2026-06-03, with a federal remediation due date of 2026-06-06.
How do I fix CVE-2026-45247?
CISA's 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.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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