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

> Disabling protected page indexing in Contao CMS leaks protected page titles and snippets to anonymous users via search results.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 9 Oct 2026
- **Updated:** 13 Oct 2026
- **Also known as:** GHSA-x2rp-9qf7-2fmq

## What is CVE-2026-107842?

CVE-2026-107842 is a medium-severity vulnerability in contao, published on 9 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2026-107842?

4 open source packages ship an affected version, including contao/core-bundle.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `contao/core-bundle` | Packagist | From 4.0.0 | 5.3.50 |
| `contao/core-bundle` | Packagist | From 4.0.0 | 5.3.50 |
| `contao/core-bundle` | Packagist | From 5.4.0-RC1 | 5.7.12 |
| `contao/core-bundle` | Packagist | From 5.4.0-RC1 | 5.7.12 |

## How do I fix CVE-2026-107842?

Upgrade contao/core-bundle to a fixed version for your release line: 5.3.50 or 5.7.12.

## Is CVE-2026-107842 being exploited?

There is no known exploitation of CVE-2026-107842 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-107842 and fix it if it is affected.

What it is: CVE-2026-107842 is a medium-severity vulnerability in contao, published on 9 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-107842 in the wild and no public exploit code.

Affected packages and fixed versions:
- contao/core-bundle (Packagist): affected from 4.0.0; fixed in 5.3.50
- contao/core-bundle (Packagist): affected from 4.0.0; fixed in 5.3.50
- contao/core-bundle (Packagist): affected from 5.4.0-RC1; fixed in 5.7.12
- contao/core-bundle (Packagist): affected from 5.4.0-RC1; fixed in 5.7.12

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-107842/ (Markdown: https://insights.sbomify.com/CVE-2026-107842/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-107842
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-107842
- OSV: https://osv.dev/vulnerability/CVE-2026-107842

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-107842/
Summaries are generated and may contain mistakes; the official description above is the record.