How severe is CVE-2026-45247?

CVE-2026-45247 has a CVSS 3.1 base score of 9.8 (CRITICAL). EPSS estimates a 2.1% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2026-45247: Mirasvit Cache Warmer for Magento

CISA Known Exploited Vulnerabilities

Mirasvit Full Page Cache Warmer Deserialization of Untrusted Data Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2026-06-03

Remediation due

2026-06-06

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.

CISA notes
https://mirasvit.com/package/changelog/?package=mirasvit/module-cache-warmer ; https://nvd.nist.gov/vuln/detail/CVE-2026-45247

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.

Severity

CVSS 4.0 · CNA9.3 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

CVSS 3.1 · CNA9.8 CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC · CISA-ADP

Exploitationactive

Automatableyes

Technical impacttotal

Affected Products

Vendor	Product	Affected versions
Mirasvit	Full Page Cache Warmer for Magento 2	0 to <1.11.12

References

3 Links

Patches

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

Third-party advisories

https://www.vulncheck.com/advisories/mirasvit-cache-warmer-for-magento-php-object-injection

Technical writeups

https://sansec.io/research/mirasvit-cache-warmer-object-injection

Record Details

Published

2026-05-26

Last updated

2026-06-04

Assigner (CNA)

VulnCheck

Credited to

Sansec

Related Tool Categories

Tool categories that test for or protect against this vulnerability class.

CWE-502 · Deserialization of Untrusted Data

Application Security Tools Penetration Testing Tools

CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.