Pimcore: ClassDefinition UID regex missing end anchor allows SQL injection via Block.php unquoted table name

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

8.5 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

EPSS

• CVE-2026-55072: 0.41% estimated exploitation activity in the next 30 days; percentile 35.22 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary A missing end anchor ($) in the ClassDefinition UID validation regex allows an authenticated user with the objects permission to create a class with a malicious UID containing SQL. When a data object of that class is later loaded, Block.php concatenates the raw classId directly into a SQL query without quoting, executing the injected payload. This is an incomplete fix from commit dbe1d131e4 which added a leading ^ anchor but omitted the trailing $. Details 1. Missing end anchor in ClassDefinition UID validation models/DataObject/ClassDefinition.php lines 1148-1154: Both patterns are missing a trailing $ anchor. Without it, pregmatch only checks that the string STARTS with a valid identifier — it does not assert end-of-string. A UID of 1 UNION SELECT password FROM users-- passes because the regex matches 1 at the start and ignores the rest. Compare with the correct pattern used by Fieldcollection in models/DataObject/Fieldcollection/Definition.php line 268: 3. Unquoted classId…

Published by the source

13 Aug 2026, 13:44 UTC

Last modified by the source

13 Aug 2026, 14:10 UTC

Source last checked

26 Oct 2026, 14:50 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-2mhj-fhvg-v428

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-2mhj-fhvg-v428

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# Patch Next advisory brief: CVE-2026-55072

Advisory: Pimcore: ClassDefinition UID regex missing end anchor allows SQL injection via Block.php unquoted table name
IDs: CVE-2026-55072, GHSA-2mhj-fhvg-v428
Record: https://patchnext.com/advisories/cve-2026-55072 (revision 2, source checked 26 Oct 2026, 14:50 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: pimcore/pimcore 2026.1.5, 12.3.9. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist pimcore/pimcore: affected >= 2026.1.0, <= 2026.1.4; < 12.3.9; fixed in 2026.1.5, 12.3.9

## Suggested inspection (read-only)
- Packagist pimcore/pimcore: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on pimcore/pimcore.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-2mhj-fhvg-v428 (OSV record GHSA-2mhj-fhvg-v428 lists affected ranges: Packagist pimcore/pimcore >=2026.1.0 =0 <12.3.9 (fixed))
- Verified: https://github.com/advisories/GHSA-2mhj-fhvg-v428 (GitHub-reviewed advisory GHSA-2mhj-fhvg-v428 lists affected ranges: Packagist pimcore/pimcore >=2026.1.0 =0 <12.3.9)

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