# CVE-2026-55634

## Summary

- **CVE ID:** CVE-2026-55634
- **Severity:** CRITICAL
- **CVSS Score:** 9.9 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H)
- **CWE:** CWE-89, CWE-94
- **Published:** Aug 28, 2026
- **Last Modified:** Aug 28, 2026

## Description

Pimcore is an Open Source Data & Experience Management Platform. Prior to 11.5.19, 12.3.10, and 2026.1.6, the class-definition import endpoint /pimcore-studio/api/class/definition/configuration-view/detail/{id}/import accepts a DataObject field name that is emitted without an identifier allowlist by lib/DataObject/ClassBuilder/FieldDefinitionPropertiesBuilder.php into generated PHP properties and by models/DataObject/ClassDefinition/Helper/Dao.php into ALTER TABLE identifiers. An authenticated user with the objects permission can inject PHP syntax into the generated DataObject class, causing attacker-controlled code in generated var/classes/DataObject/.php files to run when an object of that class is instantiated, and can also inject SQL identifier content into schema-changing statements. The central models/DataObject/ClassDefinition/Data.php::setName() validation did not reject semicolons, braces, backticks, spaces, or other non-identifier characters. This issue is fixed in versions 11.5.19, 12.3.10, and 2026.1.6.

## Affected Products

- pimcore — pimcore (< 11.5.19)
- pimcore — pimcore (>= 12.0.0-RC1, < 12.3.10)
- pimcore — pimcore (>= 2026.1.0, < 2026.1.6)

## References

- [CNA](https://github.com/pimcore/pimcore/security/advisories/GHSA-9x44-4gxf-8c25)
- [CNA](https://github.com/pimcore/pimcore/pull/19183)
- [CNA](https://github.com/pimcore/pimcore/commit/a4f8c3cfee58b7d5fe4873d67782eff58dae9b9d)
- [CNA](https://github.com/advisories/GHSA-r2f4-ff2p-xc64)
- [CNA](https://github.com/pimcore/pimcore/releases/tag/v2026.1.6)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.45%
- **EPSS Percentile:** 38.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._