---
title: "CVE-2026-55220: Pimcore Hotspotimage getDataFromResource() unrestricted Serialize::unserialize over object-store column (PHP Object Injection, CWE-502)"
url: https://erroneo.us/security/cve/CVE-2026-55220/
description: "CVE-2026-55220 (pimcore/pimcore (Composer (PHP))): Pimcore is an Open Source Data & Experience Management Platform. Prior to 11.5.19, 12.3.10, and 2026.1.6…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-08-28
date_modified: 2026-08-31
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-55220"
kev: false
cvss: 9.3
epss: 0.0068
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-55220: Pimcore Hotspotimage getDataFromResource() unrestricted Serialize::unserialize over object-store column (PHP Object Injection, CWE-502)

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.7% , percentile 52: FIRST’s model estimates a 0.7% chance of exploitation activity in the next 30 days, higher than 52% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes pimcore/pimcore (Composer (PHP)) >= 2026.1.0, <= 2026.1.5, fixed in 2026.1.6 ; pimcore/pimcore (Composer (PHP)) <= 12.3.9, fixed in 12.3.10 . Check your lockfile, including transitive dependencies.

## What it is

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

- Composer (PHP) `pimcore/pimcore` >= 2026.1.0, <= 2026.1.5 → fixed: 2026.1.6
- Composer (PHP) `pimcore/pimcore` <= 12.3.9 → fixed: 12.3.10

## Affected products (CVE record)

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

## Severity

- GitHub_M CVSS 4.0: 9.3 `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`
- GitHub CVSS 4.0: 9.3 `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`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.68% probability of exploitation activity in the next 30 days; percentile 52.

## Sources

- [GitHub Advisory GHSA-w23p-wrp7-ch38](https://github.com/advisories/GHSA-w23p-wrp7-ch38)
- [CVE.org record CVE-2026-55220](https://www.cve.org/CVERecord?id=CVE-2026-55220)
- [NVD entry CVE-2026-55220](https://nvd.nist.gov/vuln/detail/CVE-2026-55220)
- [github.com](https://github.com/pimcore/pimcore/security/advisories/GHSA-w23p-wrp7-ch38)
- [github.com](https://github.com/pimcore/pimcore/pull/19181)
- [github.com](https://github.com/pimcore/pimcore/commit/b184c01bf11e213e601d965b4e96c8bb7248e980)
- [github.com](https://github.com/pimcore/pimcore/releases/tag/v12.3.10)
- [github.com](https://github.com/pimcore/pimcore/releases/tag/v2026.1.6)

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Source page: https://erroneo.us/security/cve/CVE-2026-55220/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt