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Vulnerability · Published Aug 28, 2026 · Assigned by GitHub_M

CVE-2026-55220Pimcore Hotspotimage getDataFromResource() unrestricted Serialize::unserialize over object-store column

Critical 9.3

In plain English

A critical-severity unsafe deserialization in pimcore from pimcore. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)9.3Critical
Exploit odds (30 days)0.7%top 47.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Pimcore is an Open Source Data & Experience Management Platform. Prior to 11.5.19, 12.3.10, and 2026.1.6, Pimcore\Model\DataObject\ClassDefinition\Data\Hotspotimage::getDataFromResource() in models/DataObject/ClassDefinition/Data/Hotspotimage.php passes the field __hotspots object-store column to Pimcore\Tool\Serialize::unserialize() without an allowed-classes restriction after JSON decoding fails. An attacker with a separate capability to write crafted PHP serialized bytes into that column can instantiate available classes and trigger magic methods when an affected DataObject is loaded, which can produce arbitrary file writes or code execution through bundled gadget chains. The related ImageGallery, Block, and Video callers use the same fallback pattern, but the identified June fix changes the Hotspotimage caller only. This issue is fixed for Hotspotimage in versions 11.5.19, 12.3.10, and 2026.1.6.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Packagistpimcore/pimcore2026.1.6GHSA-w23p-wrp7-ch38
Packagistpimcore/pimcore12.3.10GHSA-w23p-wrp7-ch38

Affected products (as reported)

VendorProductVersions
pimcore pimcore < 11.5.19>= 12.0.0-RC1, < 12.3.10>= 2026.1.0, < 2026.1.6

Weakness: CWE-502 · Vector: 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

References