CVE-2026-57232 - Contao: Server-Side Request Forgery (SSRF) via Unvalidated RSS Feed URL in Feed Reader Module

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LOW

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

Published Jul 31, 2026

3.1

LOW

CVSS 3.1

EPSS 0.29%

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.

Affected products

Vendor Contao Product Contao Default
n/a
- Version
  >= 5.3.35, < 5.3.48
  Status
  affected
  Constraints
  -
- Version
  >= 5.7.0-RC1, < 5.7.9
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Contao

n/a

Version	Status	Constraints
>= 5.3.35, < 5.3.48	affected	-
>= 5.7.0-RC1, < 5.7.9	affected	-

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-918

SSRF

References (11)

Link	Providers	Tags
https://contao.org/en/security-advisories/server-side-request-forgery-via-unvalidated-rss-feed-urls
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-51596		Advisory
https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/contao/CVE-2026-57232.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/core-bundle/CVE-2026-57232.yaml
https://github.com/advisories/GHSA-87mg-5grr-rhwh		Advisory
https://github.com/contao/contao/commit/27f6201809553bee767dcef15535bb8f0f4eac5f		x_refsource_MISC
https://github.com/contao/contao/commit/53b939ff2c4718e3a1d7c54ddd8886e9370618e4		x_refsource_MISC
https://github.com/contao/contao/releases/tag/5.3.48
https://github.com/contao/contao/releases/tag/5.7.9
https://github.com/contao/contao/security/advisories/GHSA-87mg-5grr-rhwh		x_refsource_CONFIRM
https://nvd.nist.gov/vuln/detail/CVE-2026-57232