Widespread Magento ecosystem; unauthenticated RCE via vulnerable Mirasvit Cache Warmer plugin could disrupt many merchants.
CVE-2026-45247
Unauthenticated RCE in Magento 2 via Mirasvit cache warmer cookie.
Is CVE-2026-45247 being exploited?
Yes. CVE-2026-45247 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2026-45247?
CVE-2026-45247 is rated Critical with a CVSS score of 9.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-45247?
Yes. A fix has been recorded for CVE-2026-45247. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-45247 affect?
CVE-2026-45247 affects Magento 2 with Mirasvit Full Page Cache Warmer <=1.11.11. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-45247?
Patch to 1.11.12 or vendor fix immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution via PHP unserialize() of crafted object in CacheWarmer cookie; attacker can run arbitrary code on server.
Immediate action required
- affected< 1.11.12
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.