cyfenced.com →

[ CVE-2026-107851 · Published 9 Oct 2026 ]

Contao: Improper access control in the table access voter

CVSS 4.3 EPSS <1%Fix available

[ Description ]Official 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.

[ Fixes ]Fixes and patches

  • contao/core-bundle 5.7.12Fixed version · GitHub Advisories · composer package contao/core-bundle: upgrade to 5.7.12 or later (affected >= 5.7.0, < 5.7.12)

[ Packages ]Affected open-source packages

  • contao/core-bundle composerAffected >= 5.7.0, < 5.7.12 · fixed in 5.7.12 · GHSA-5974-gfqc-wrcm

[ References ]References