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CVE-2026-107842— Contao: Protected page content is disclosed to anonymous visitors after contao.search.index_protected is disabled

Quick assessment

Affected
contao contao
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Contao 是一个开源内容管理系统（CMS）。在版本 4.0.0 至 5.3.50 以及 5.7.12 之前的版本中，若将配置项 从启用状态更改为禁用状态，模块 会向未认证的访问者泄露受保护页面的标题、URL 以及已索引的上下文片段。 在 表中，授权元数据是按行存储的。但禁用该设置会移除对受保护行的过滤逻辑，而不会删除在启用保护期间已索引的行。尽管受保护页面仍然会返回授权响应（即访问控制依然有效），但此漏洞会导致搜索元数据和已索引的文本内容被暴露，而非绕过页面访问权限。 该问题已在版本 5.3.50 和 5.7.

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 2

VendorProduct Version RangeStatus
contao contao >= 4.0.0, < 5.3.50 affected
>= 5.4.0-RC1, < 5.7.12 affected
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I. Basic Information for CVE-2026-107842

Vulnerability Information
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Vulnerability Title
Contao: Protected page content is disclosed to anonymous visitors after contao.search.index_protected is disabled
Source: CVE Program / CVE List V5
Vulnerability Description
Contao is an Open Source CMS. From version 4.0.0 until 5.3.50 and 5.7.12, ModuleSearch can disclose protected page titles, URLs, and indexed context snippets to unauthenticated visitors when contao.search.index_protected is changed from enabled to disabled. Authorization metadata is stored per row in tl_search, but disabling the setting removes the protected-row filter without deleting rows indexed while protection was enabled. The protected pages continue to return an authorization response, so this issue exposes search metadata and indexed text rather than bypassing page access. This issue is fixed in versions 5.3.50 and 5.7.12.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
contao contao >= 4.0.0, < 5.3.50 -

II. Public POCs for CVE-2026-107842

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III. Intelligence Information for CVE-2026-107842

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Patches & Fixes for CVE-2026-107842 (1)

Vendor Advisories for CVE-2026-107842 (1)

Vendor Pages for CVE-2026-107842 (2)

Same Patch Batch · contao · 2026-10-09 · 7 CVEs total

CVE-2026-107845 9.3 CRITICAL Contao: Cross-site scripting in the comments bundle
CVE-2026-107844 5.3 MEDIUM Contao: Path traversal in the images controller
CVE-2026-107843 5.3 MEDIUM Contao: The registration module re-sends activation mails on any unauthenticated POST, wit
CVE-2026-107851 4.3 MEDIUM Contao: Improper access control in the table access voter
CVE-2026-107850 4.3 MEDIUM Contao: Improper access control in the preview links module
CVE-2026-107848 3.5 LOW Contao: Cross-site request forgery in custom backend actions

IV. Related Vulnerabilities

Same product: contao
Same vendor: contao
Same weakness: CWE-200

V. Comments for CVE-2026-107842

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