Description
Contao is an Open Source CMS. From version 5.7.0 until 5.7.12, TableAccessVoter::hasAccessToModule() in core-bundle/src/Security/Voter/DataContainer/TableAccessVoter.php caches authorization decisions using only $tokenHash, a hash of the user's security token, and omits the table returned by getDataSource(). If one request first checks a table allowed to the user and then a different denied table, the voter can reuse the allowed result, while DefaultDataContainerVoter can convert an incorrect abstention into a grant. A low-privileged backend user can consequently read, create, update, or delete records in tables outside assigned module permissions, including tables containing member or newsletter-subscriber data. This issue is fixed in version 5.7.12.
Published: 2026-10-09
Score: 4.3 Medium
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

No solution or workaround provided in the CVE record.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-5974-gfqc-wrcm Contao: Improper access control in the table access voter
History

Tue, 13 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 09 Oct 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Contao
Contao contao
Vendors & Products Contao
Contao contao

Fri, 09 Oct 2026 20:45:00 +0000

Type Values Removed Values Added
Description Contao is an Open Source CMS. From version 5.7.0 until 5.7.12, TableAccessVoter::hasAccessToModule() in core-bundle/src/Security/Voter/DataContainer/TableAccessVoter.php caches authorization decisions using only $tokenHash, a hash of the user's security token, and omits the table returned by getDataSource(). If one request first checks a table allowed to the user and then a different denied table, the voter can reuse the allowed result, while DefaultDataContainerVoter can convert an incorrect abstention into a grant. A low-privileged backend user can consequently read, create, update, or delete records in tables outside assigned module permissions, including tables containing member or newsletter-subscriber data. This issue is fixed in version 5.7.12.
Title Contao: Improper access control in the table access voter
Weaknesses CWE-524
CWE-863
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-13T17:03:02.847Z

Reserved: 2026-10-08T22:34:49.292Z

Link: CVE-2026-107851

cve-icon Vulnrichment

Updated: 2026-10-13T17:02:55.162Z

cve-icon NVD

Status : Received

Published: 2026-10-09T21:17:02.920

Modified: 2026-10-13T18:17:16.270

Link: CVE-2026-107851

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-09T21:30:12Z

Weaknesses