CVE-2026-107851

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.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/contao/contao/commit/9d6f582a4cc6a758ce11d1043fc9c0ba62c5f4c9
https://github.com/contao/contao/releases/tag/5.7.12
https://github.com/contao/contao/security/advisories/GHSA-5974-gfqc-wrcm

Configurations

No configuration.

History

09 Oct 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-09 21:17

Updated : 2026-10-16 20:04

NVD link : CVE-2026-107851

Mitre link : CVE-2026-107851

CVE.ORG link : CVE-2026-107851

JSON object : View

Products Affected

No product.

CWE

CWE-524

Use of Cache Containing Sensitive Information

CWE-863

Incorrect Authorization

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