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[ CVE-2026-57232 · Published 31 Jul 2026 ]

Contao: Server-Side Request Forgery (SSRF) via Unvalidated RSS Feed URL in Feed Reader Module

CVSS 3.1 EPSS <1%Fix available

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

  • contao/contao 5.3.48Fixed version · GitHub Advisories · composer package contao/contao: upgrade to 5.3.48 or later (affected >= 5.3.35, < 5.3.48)
  • contao/contao 5.7.9Fixed version · GitHub Advisories · composer package contao/contao: upgrade to 5.7.9 or later (affected >= 5.4.0, < 5.7.9)
  • contao/core-bundle 5.3.48Fixed version · GitHub Advisories · composer package contao/core-bundle: upgrade to 5.3.48 or later (affected >= 5.3.35, < 5.3.48)
  • contao/core-bundle 5.7.9Fixed version · GitHub Advisories · composer package contao/core-bundle: upgrade to 5.7.9 or later (affected >= 5.4.0, < 5.7.9)

[ Packages ]Affected open-source packages

[ References ]References