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Findings

CVE-2026-107842

Contao: Protected page content is disclosed to anonymous visitors after contao.search.index_protected is disabled

Published Oct 9, 2026 · updated Oct 9, 2026

decides whether to filter protected pages out of search results based on the current value of , but the authorisation data lives per row in . Turning the setting off removes the filter without removing the rows, so protected pages that were indexed while it was on are returned to unauthenticated visitors such as title, URL and context snippet, even though the pages themselves still answer 401. ## Impact Disclosure of member-only page titles, URLs and indexed text to unauthenticated visitors through the site search. The pages themselves remain access-controlled, so this is not a page-access bypass. ## Credits This security vulnerability was found by @iRevivalx .

Timeline

Detection, updates, and resolution for this record.

  1. Oct 9, 2026 · Catalog

    Detected

    decides whether to filter protected pages out of search results based on the current value of , but the authorisation data lives per row in . Turning the setting off removes the filter without removing the rows, so protected pages that were indexed while it was on are returned to unauthenticated visitors such as title, URL and context snippet, even though the pages themselves still answer 401. ##

  2. Oct 9, 2026 · Catalog

    Fix available

    Packagist contao/core-bundle 4.0.0 → 5.3.50

  3. Oct 9, 2026 · Catalog

    Fix available

    Packagist contao/core-bundle 5.4.0-RC1 → 5.7.12

  4. Oct 9, 2026 · GitHub Advisory Database

    Fix available

    contao/core-bundle fixed in 5.3.50; contao/core-bundle fixed in 5.7.12

  5. Oct 9, 2026 · GitHub Advisory Database

    Fix available

    contao/core-bundle fixed in 5.3.50

  6. Oct 9, 2026 · GitHub Advisory Database

    Fix available

    contao/core-bundle fixed in 5.7.12

  7. Oct 9, 2026 · Catalog

    Updated

    decides whether to filter protected pages out of search results based on the current value of , but the authorisation data lives per row in . Turning the setting off removes the filter without removing the rows, so protected pages that were indexed while it was on are returned to unauthenticated visitors such as title, URL and context snippet, even though the pages themselves still answer 401. ##

Affected

  • Packagist contao/core-bundle4.0.0 → 5.3.50
  • Packagist contao/core-bundle5.4.0-RC1 → 5.7.12

Sources

References

CVE-2026-107842 · ZeroDay Findings