CVE-2026-57232
LowCVSS 3.1Exploitation Probability (EPSS)
Low risk8th percentile - higher than 8% of all known CVEs
Summary
Contao CMS versions 5.3.35 through 5.3.47 and 5.7.0-RC1 through 5.7.8 contain an SSRF vulnerability in the Feed Reader module. A backend user with module-edit permissions can make the server request internal network services, loopback addresses, or cloud metadata endpoints.
Risk Assessment
An attacker can scan the internal network, access confidential services, or steal credentials from cloud metadata.
Recommendation
Update Contao to version 5.3.48 or later, which includes the fix.
Original NVD description (English source)
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.