CVE-2026-45247 Mirasvit CVE debrief

Who should care

Defenders responsible for Mirasvit Full Page Cache Warmer installations should assess exposure and prioritize remediation. This includes operators, platform administrators, vulnerability management teams, and security teams. Defenders should verify inventory for potential compromise and apply mitigations per vendor instructions. The vulnerability's critical severity requires immediate attention from defenders.

Why it matters

The Mirasvit Full Page Cache Warmer vulnerability poses a critical risk due to deserialization of untrusted data. Defenders should assess exposure, prioritize remediation, and verify inventory for potential compromise.

• Verify inventory for potential compromise
• Apply mitigations per vendor instructions
• Follow applicable BOD 22-01 guidance for cloud services

Technical summary

The Mirasvit Full Page Cache Warmer vulnerability allows for deserialization of untrusted data, which can lead to critical consequences. The vulnerability affects Mirasvit Full Page Cache Warmer installations and requires immediate attention from defenders. The deserialization of untrusted data can lead to arbitrary code execution, posing a critical risk to defenders. Defenders should assess exposure and prioritize remediation for Mirasvit Full Page Cache Warmer installations.

Defensive priority

High

Recommended defensive actions

• Assess exposure and prioritize remediation for Mirasvit Full Page Cache Warmer installations
• Verify inventory for potential compromise and apply mitigations per vendor instructions
• Follow applicable BOD 22-01 guidance for cloud services or discontinue use if mitigations are unavailable

Evidence notes

The CISA Known Exploited Vulnerabilities catalog and CVE Program record confirm the vulnerability's existence and critical severity. The vulnerability is known to be exploited in the wild, and defenders should assess exposure and prioritize remediation. Evidence of exploitation is limited, but defenders should verify inventory for potential compromise. The CISA catalog and CVE record provide official confirmation of the vulnerability's critical severity.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.