Mirasvit · Mirasvit Full Page Cache Warmer

CVE-2026-45247

Mirasvit Cache Warmer for Magento < 1.11.12 PHP Object Injection

Exploited in attacks Critical 9.3 Attack chance: 26%

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.

CISA: Mirasvit Full Page Cache Warmer contains a deserialization of untrusted data vulnerability that could allow unauthenticated attackers to achieve remote code execution by supplying a crafted serialized PHP object in the CacheWarmer cookie.

What 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.

Deadline for US federal agencies: June 6, 2026

mirasvit.com/package/changelog/?package=mirasvit/module-cache-warmer

Added to the CISA list: June 3, 2026
Published: May 26, 2026
Severity: Critical 9.3 CVSS 4.0
Chance of attacks in the next 30 days (EPSS): 26% in the top 2.0% of all known vulnerabilities
Weakness: CWE-502
More details: NVD · CVE.org · CISA

All references (3)

Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.