What’s Vulnerable › Vulnerabilities

CVE-2026-55634: Pimcore: Remote Code Execution via DataObject Class-Definition Field Name

• Severity: critical (CVSS 9.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-09-09
• Weakness: CWE-89

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: before 11.5.19; from 12.0.0-RC1, < 12.3.10; from 2026.1.0, < 2026.1.6

References

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

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