Mirasvit Full Page Cache Warmer's Deserialization Flaw Lets Unauthenticated Attackers Reach Remote Code Execution via a Crafted PHP Object in the CacheWarmer Cookie; CISA's June 6th KEV Deadline Has Passed

Last refreshed2026-09-27

Status: KEV | Advisory ID: CVE-2026-45247

Key Details

CVE	CVE-2026-45247
Vulnerability Name	Mirasvit Full Page Cache Warmer Deserialization of Untrusted Data Vulnerability
Affected products	Mirasvit Mirasvit Full Page Cache Warmer
Exploitation status	Listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating confirmed active exploitation.
Classified as	CWE-502 (Deserialization of Untrusted Data)
KEV listing	Added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-06-03.
Exploitation prediction (EPSS)	2.08% probability of exploitation in the next 30 days (81% percentile) -- FIRST.org's EPSS model.
Federal remediation deadline	2026-06-06 (CISA KEV, Binding Operational Directive).

Affected Products, Subsystems & Sectors

Vendor	Product	Affected Versions	Patch Status
Mirasvit	Mirasvit Full Page Cache Warmer

Vendor

Product

Affected Versions

Patch Status

Mirasvit

Mirasvit Full Page Cache Warmer

Subsystems	General OT
Sectors	Multiple

What to Know

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

Monitor Mirasvit's web page for any future patch releases.

References

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-45247
CVE	https://www.cve.org/CVERecord?id=CVE-2026-45247

Source

Reference

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-45247

CVE

https://www.cve.org/CVERecord?id=CVE-2026-45247

KEV Required Action

Field	Value
KEV Link	https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Date Added to KEV	2026-06-03
Required Action Due Date	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.

Field

Value

KEV Link

https://www.cisa.gov/known-exploited-vulnerabilities-catalog

Date Added to KEV

2026-06-03

Required Action Due Date

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.