Answer in brief
CVE-2026-55634 records a Critical severity (CVSS 9.9) vulnerability in Pimcore: Remote Code Execution via DataObject Class-Definition Field Name. The current sources do not mark it as known exploited. The current feed maps pimcore/pimcore (composer), pimcore/pimcore (composer), pimcore/pimcore (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps pimcore/pimcore (composer), pimcore/pimcore (composer), pimcore/pimcore (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| pimcore/pimcorecomposer | <=12.3.9 | 12.3.10 |
| pimcore/pimcorecomposer | >=2026.1.0,<=2026.1.5 | 2026.1.6 |
| pimcore/pimcoregeneric | < 11.5.19 || >= 12.0.0-RC1, < 12.3.10 || >= 2026.1.0, < 2026.1.6 | Not reported |
Published upstream
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 28, 2026
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.
Quoted source text, attributed separately from HOL analysis.