Contao: Server-Side Request Forgery (SSRF) via Unvalidated RSS Feed URL in Feed Reader Module
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.
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 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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| contao | contao | 5.7.0-RC1 to before 5.7.9; 5.3.35 to before 5.3.48 | 5.7.9, 5.3.48 | Patch available | CNA |
| — | contao/contao (Packagist) | 5.3.35 to before 5.3.48 | 5.3.48 | Patch available | GHSA-87mg-5grr-rhwh |
| — | contao/contao (Packagist) | 5.4.0 to before 5.7.9 | 5.7.9 | Patch available | GHSA-87mg-5grr-rhwh |
| — | contao/core-bundle (Packagist) | 5.3.35 to before 5.3.48 | 5.3.48 | Patch available | GHSA-87mg-5grr-rhwh |
| — | contao/core-bundle (Packagist) | 5.4.0 to before 5.7.9 | 5.7.9 | Patch available | GHSA-87mg-5grr-rhwh |
- contao Vendorcontao Affected 5.7.0-RC1 to before 5.7.9; 5.3.35 to before 5.3.48 Fixed in 5.7.9, 5.3.48 Patch available CNA
- contao/contao (Packagist) Vendor— Affected 5.3.35 to before 5.3.48 Fixed in 5.3.48 Patch available GHSA-87mg-5grr-rhwh
- contao/contao (Packagist) Vendor— Affected 5.4.0 to before 5.7.9 Fixed in 5.7.9 Patch available GHSA-87mg-5grr-rhwh
- contao/core-bundle (Packagist) Vendor— Affected 5.3.35 to before 5.3.48 Fixed in 5.3.48 Patch available GHSA-87mg-5grr-rhwh
- contao/core-bundle (Packagist) Vendor— Affected 5.4.0 to before 5.7.9 Fixed in 5.7.9 Patch available GHSA-87mg-5grr-rhwh
Remediation
- Fix · CNA contao (contao) Fixed in 5.7.9, 5.3.48
- Fix · GHSA-87mg-5grr-rhwh contao/contao (Packagist) Fixed in 5.3.48 Advisory →
- Fix · GHSA-87mg-5grr-rhwh contao/contao (Packagist) Fixed in 5.7.9 Advisory →
- Fix · GHSA-87mg-5grr-rhwh contao/core-bundle (Packagist) Fixed in 5.3.48 Advisory →
- Fix · GHSA-87mg-5grr-rhwh contao/core-bundle (Packagist) Fixed in 5.7.9 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-57232
- 2026-10-03 Alias added: GHSA-87mg-5grr-rhwh
References
Other 9
- 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
- https://contao.org/en/security-advisories/server-side-request-forgery-via-unvalidated-rss-feed-urls
- 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/contao/contao
- https://github.com/contao/contao/releases/tag/5.3.48
- https://github.com/contao/contao/releases/tag/5.7.9
More contao vulnerabilities
- TI-2022-09661 Contao Managed Edition v1.5.0 was discovered to contain a remote command execution (RCE)… CVSS 3.1CRITICAL 9.8
- TI-2024-30849 Unrestricted file upload in Contao CVSS 3.1MEDIUM 6.4
- TI-2023-18600 Contao cross site scripting vulnerability via input unit widget CVSS 3.1MEDIUM 6.5
- TI-2014-01453 Contao CMS through 3.2.4 has PHP Object Injection Vulnerabilities CVSS 3.1CRITICAL 9.8
- TI-2022-08709 Cross site scripting via canonical tag CVSS 3.1HIGH 7.2
- TI-2019-08602 Contao 4.x allows SQL Injection. CVSS 3.0CRITICAL 9.8
Sources
- CVE-2026-57232 · CVE Program
- CVE-2026-57232 · NVD
- FIRST EPSS
- GHSA-87mg-5grr-rhwh · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences