How severe is CVE-2026-45247?

CVE-2026-45247 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-45247 being actively exploited?

Yes. CVE-2026-45247 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-06-03, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2026-45247?

CVE-2026-45247 affects Mirasvit Full Page Cache Warmer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-45247?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2026-45247 have an EU (EUVD) identifier?

Yes. CVE-2026-45247 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31837. It is also flagged as exploited in the EUVD (since 2026-06-03).

When was CVE-2026-45247 published?

CVE-2026-45247 was published on 2026-05-26 and last updated on 2026-06-17.

CVE-2026-45247

CVE-2026-45247 is a critical-severity vulnerability in Mirasvit Full Page Cache Warmer with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2026-06-03). The underlying weakness is classified as CWE-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 28% (98th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2026-06-03)
EU (EUVD) id: EUVD-2026-31837
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2026-06-03)
Weakness: CWE-502
Affected product: Mirasvit Full Page Cache Warmer
Published: 2026-05-26
Last modified: 2026-06-17

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.

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 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-45247 being actively exploited?: Yes. CVE-2026-45247 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-06-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2026-45247?: CVE-2026-45247 affects Mirasvit Full Page Cache Warmer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-45247?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2026-45247 have an EU (EUVD) identifier?: Yes. CVE-2026-45247 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31837. It is also flagged as exploited in the EUVD (since 2026-06-03).
When was CVE-2026-45247 published?: CVE-2026-45247 was published on 2026-05-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mirasvit:full_page_cache_warmer:*:*:*:*:*:magento:*:*

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