CVE-2026-63414
HighCVSS 7.6Exploitation Probability (EPSS)
Low risk46th percentile - higher than 46% of all known CVEs
Summary
In Shopify App (Rails engine) from 22.1.0 until 23.0.3, token-exchange authenticated controllers can expose a request-derived shop context instead of the identity from a verified Shopify ID token or active session. current_shopify_domain can resolve to the sanitized shop query parameter, so a request authenticated for one shop can be treated as another requested shop.
Risk Assessment
An attacker with a valid Shopify session token for one shop can supply another shop and potentially obtain unauthorized application data or perform shop-scoped actions.
Recommendation
Update shopify_app to version 23.0.3 or later and avoid relying on current_shopify_domain or params[:shop] for authorization without identity verification.
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Original NVD description (English source)
Shopify App is a Rails engine for building Shopify applications. From 22.1.0 until 23.0.3, `token-exchange` authenticated controllers can expose a request-derived `shop` context instead of the identity from a verified Shopify ID token or active Shopify session. `current_shopify_domain` can resolve to the sanitized `shop` query parameter, so a request authenticated for one `shop` can cause application code to treat a different requested `shop` as current. Affected applications use `shopify_app` `token-exchange` authentication, accept authenticated requests with a `shop` query parameter, and rely on `current_shopify_domain` or `params[:shop]` for authorization, tenant lookup, stored access-token selection or `shop`-scoped data access. An attacker with a valid Shopify session token for one `shop` can supply another `shop` in that parameter and potentially obtain unauthorized application data or perform `shop`-scoped actions, depending on the application's authorization model. This issue is fixed in version 23.0.3.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

