Have exploitation attempts been observed for CVE-2026-45247?

Yes. Exploitation attempts have been reported for this vulnerability. Previdian lists CVE-2026-45247 as a known exploited vulnerability. Confidence is confirmed.

What exploitation activity has Previdian observed?

Previdian has not yet recorded sensor-observed exploitation attempts for CVE-2026-45247. Our sensors continue to monitor for activity targeting this CVE.

Which versions are affected?

CVE-2026-45247 affects Mirasvit Full Page Cache Warmer for Magento 2. Reported affected version: 0 to < 1.11.12.

Yes. CVE-2026-45247 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

CVE-2026-45247 Exploitation Attempts Observed in the Wild — Full Page Cache Warmer for Magento 2

Q: How should organizations remediate it?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Q: Is it in CISA KEV?

Yes. CVE-2026-45247 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-45247 is an unauthenticated Mirasvit Cache Warmer for Magento < 1.11.12 PHP Object Injection. Mirasvit Full Page Cache Warmer for Magento 2 before version 1.11.12 contains a PHP object injection vulnerability...

Have exploitation attempts been observed?

Yes. Exploitation attempts have been reported for this vulnerability. Previdian lists it as a known exploited vulnerability. Listed in CISA KEV. Also reported by third-party sources. Confidence is confirmed.

Who is affected?

Mirasvit / Full Page Cache Warmer for Magento 2 affected before 1.11.12.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Mirasvit Cache Warmer for Magento < 1.11.12 PHP Object Injection

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.

Vendor Product Affected Status

Mirasvit Affected

Full Page Cache Warmer for Magento 2

Before 1.11.12

Affected

View vendor advisory

Published: 26 May 2026
Exploitation Attempts Reported: 03 Jun 2026
Attack vector: Remote
Complexity: Low
Privileges: None
User interaction: None

CVE References

CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2026-45247
Patch — mirasvit.com mirasvit.com · Patch https://mirasvit.com/package/changelog/?package=mirasvit/module-cache...
Third-Party Advisory — vulncheck.com vulncheck.com · Third-Party Advisory https://www.vulncheck.com/advisories/mirasvit-cache-warmer-for-magent...
Technical Description — sansec.io sansec.io · Technical Description https://sansec.io/research/mirasvit-cache-warmer-object-injection

Exploitation evidence

Evidence of exploitation attempts

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploitation attempts observed in the wild

CISA

Recorded 03 Jun 2026

A trusted third party reported exploitation attempts.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access

Source	Added
CISA First	2026-06-03 18:00 UTC
All CISA Advisories	2026-06-03 18:20 UTC
The Shadowserver	2026-06-03 19:00 UTC
CVE	2026-06-03 19:40 UTC
The Hacker News	2026-06-04 08:20 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts: 0; 0; 0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v4.0

9.3 Critical

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

2.1%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Deserialization of Untrusted Data CWE-502

Recent mention · The Hacker News

04 Jun 2026

CISA Adds Exploited Magento RCE Flaw CVE-2026-45247 to KEV Catalog

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Wednesday added a critical flaw impacting Mirasvit Cache Warmer, a popular Magento full-page cache extension, to its Known Exploited Vulnerabilities (KEV) catalog, following reports of active exploitation in...

Read full advisory

All CVSS Scores

CVSS v4.0 9.3 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 v3.1 9.8 Critical

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

All Mentions

Recent mention · The Hacker News

CISA Adds Exploited Magento RCE Flaw CVE-2026-45247 to KEV Catalog

The Hacker News · 04 Jun 2026

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Wednesday added a critical flaw impacting Mirasvit Cache Warmer, a popular Magento full-page cache extension, to its Known Exploited Vulnerabilities (KEV) catalog, following reports of active exploitation in the wild. The vulnerability, tracked as CVE-2026-45247 (CVSS score: 9.8), is a case of deserialization of untrusted

Recent mention · All CISA Advisories

CISA Adds One Known Exploited Vulnerability to Catalog

All CISA Advisories · 03 Jun 2026

CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2026-45247 Mirasvit Full Page Cache Warmer Deserialization of Untrusted Data Vulnerability This type of vulnerability is a frequent attack vector for malicious cyber actors and poses significant risks to the federal enterprise. Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant...

Timeline

From disclosure to observed exploitation attempts

04 Jun 2026
08:20 UTC

KEV confirmed by The Hacker News

Exploitation attempts reported by an external source
03 Jun 2026
19:40 UTC

KEV confirmed by CVE

Exploitation attempts reported by an external source
03 Jun 2026
19:00 UTC

KEV confirmed by The Shadowserver

Exploitation attempts reported by an external source
03 Jun 2026
18:20 UTC

KEV confirmed by All CISA Advisories

Exploitation attempts reported by an external source
03 Jun 2026
18:00 UTC

Added to CISA KEV

Listed in the CISA Known Exploited Vulnerabilities catalog
26 May 2026
14:15 UTC

CVE published

Vulnerability disclosed publicly
11 May 2026
14:14 UTC

CVE ID reserved

Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

Start 14-day Pro trial Read API docs

Evidence confidence and provenance
First-party sensor telemetry
PoC and scanner references
Affected versions and enrichment
Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2026-45247

Sample API response

{
  "cve_id": "CVE-2026-45247",
  "confidence": "Confirmed",
  "cvss_score": 9.3,
  "cvss_estimated": false,
  "epss_score": 0.02085,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

CVE-2026-45247

Mirasvit Cache Warmer for Magento < 1.11.12 PHP Object Injection

Tags

CVE References

Exploitation attempts observed in the wild

Known exploited vulnerability sources

Observed signals

Scanner coverage

Virtual patch status

Weaknesses

CISA Adds Exploited Magento RCE Flaw CVE-2026-45247 to KEV Catalog

All CVSS Scores

All Mentions

KEV confirmed by The Hacker News

KEV confirmed by CVE

KEV confirmed by The Shadowserver

KEV confirmed by All CISA Advisories

Added to CISA KEV

CVE published

CVE ID reserved

Automate this intelligence