---
id: CVE-2026-57232
title: Contao is an Open Source CMS
summary: >-
  Contao is an Open Source CMS. From 5.3.35 through 5.3.47 and from 5.7.0-RC1
  through 5.7.8, the Feed Reader front-end module passes configured RSS feed
  URLs from FeedReaderController::getResponse() to feedIo->read() without scheme
  or priv…
severity: low
cvss: 3.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-918
published: '2026-07-31'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:51:43.490'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-57232'
references:
  - url: >-
      https://github.com/contao/contao/commit/27f6201809553bee767dcef15535bb8f0f4eac5f
    label: security-advisories@github.com
  - url: >-
      https://github.com/contao/contao/commit/53b939ff2c4718e3a1d7c54ddd8886e9370618e4
    label: security-advisories@github.com
  - url: 'https://github.com/contao/contao/security/advisories/GHSA-87mg-5grr-rhwh'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00182
epssPercentile: 0.08033
ingestedAt: '2026-09-08T21:11:12.261Z'
---

## Overview

Contao is an Open Source CMS. From 5.3.35 through 5.3.47 and from 5.7.0-RC1 through 5.7.8, the Feed Reader front-end module passes configured RSS feed URLs from FeedReaderController::getResponse() to feedIo->read() without scheme or private-address validation, allowing a backend user with module-edit permissions to make the server request internal network services, loopback addresses, or cloud metadata endpoints. In core-bundle/src/Controller/FrontendModule/FeedReaderController.php, the getResponse() function iterates over the configured feed URLs and passes each one directly to the HTTP client (via $this->feedIo->read($url, new Feed())) with no validation, while the DCA field definition for rss_feed in tl_module.php carries no URL scheme or host validation and the HTTP client is wired as @psr18.http_client (Symfony HttpClient) with no SSRF protection configured, since NoPrivateNetworkHttpClient is not used. This issue is fixed in versions 5.3.48.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.