Shopware up to 6.7.10.0 SSO Entry Point /api/oauth/sso/auth Referer redirect

Summaryinfo

A vulnerability categorized as problematic has been discovered in Shopware up to 6.7.10.0. The impacted element is an unknown function of the file /api/oauth/sso/auth of the component SSO Entry Point. Such manipulation of the argument Referer leads to redirect. This vulnerability is documented as CVE-2026-48012. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Shopware up to 6.7.10.0. It has been rated as problematic. Affected by this issue is an unknown functionality of the file /api/oauth/sso/auth of the component SSO Entry Point. The manipulation of the argument Referer with an unknown input leads to a redirect vulnerability. Using CWE to declare the problem leads to CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. Impacted is integrity. CVE summarizes:

Shopware is an open commerce platform. Versions 6.7.3.0 through 6.7.10.0 have an open redirect in Shopware's public SSO entry point at `GET /api/oauth/sso/auth`. When the endpoint is reached without the expected SSO session state, the application falls back to the request's `Referer` header and uses that value as the redirect destination. In the validated behavior, the server does not restrict that fallback target to same-origin URLs, does not require a relative path, and does not reject dangerous schemes such as `javascript:`. As a result, an unauthenticated request can turn this endpoint into a reusable redirect primitive whose destination is fully controlled by attacker-supplied request metadata. The security problem is not limited to a harmless navigation mismatch. The endpoint sits under `/api/oauth/`, which gives the redirect a trustworthy application-controlled origin and makes it suitable for phishing chains, branded redirect abuse, and cases where client software automatically follows redirects issued by a trusted host. The attached evidence also shows that the response is not only an HTTP `302` with a user-controlled `Location` header. The HTML body contains a matching meta refresh tag and redirect link built from the same attacker-controlled value. In the validated proof, the endpoint redirects to `https://attacker.example/poc` when that URL is supplied through `Referer`, and it also reflects `javascript:alert(1)` into `Location` and the HTML redirect body without any scheme filtering. This report therefore stays conservative and claims an open redirect with arbitrary redirect targets, while noting that the lack of scheme restrictions makes the behavior materially worse than a same-scheme external redirect. Version 6.7.10.1 fixes the issue.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-48012 since 05/20/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1204.001.

Upgrading to version 6.7.10.1 eliminates this vulnerability.

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Productinfo

Name

• Shopware

Version

• 6.7.0
• 6.7.1
• 6.7.2
• 6.7.3
• 6.7.4
• 6.7.5
• 6.7.6
• 6.7.7
• 6.7.8
• 6.7.9
• 6.7.10.0

License

• commercial

Website

• Product: https://github.com/shopware/shopware/

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