Deserialization of Untrusted Data in Pimcore - CVE-2026-55220
Published: September 17, 2026
Vulnerability identifier: #VU150529
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-55220
CWE-ID: CWE-502
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to unrestricted deserialization of untrusted data in the Hotspotimage getDataFromResource() method and sibling ImageGallery, Block, and Video marshallers when loading a DataObject after crafted serialized data is written to an object-store column. A local user can write crafted serialized data to an affected object-store column to execute arbitrary code.
The affected load path requires a DataObject with one of the affected field types and a non-null associated image value.
Affected software
Pimcore
How to mitigate CVE-2026-55220
Install security update from vendor's website.
Pimcore - addressed in versions 12.3.10, 2026.1.6