Vulnerability · Published Oct 30, 2026 · Assigned by GitHub_M
CVE-2026-63414Shopify App: Token exchange shop context confusion may allow cross-shop authorization bypass in affected apps
High 7.6
In plain English
A high-severity incorrect authorization in shopify_app from Shopify. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| RubyGems | shopify_app | 23.0.3 | GHSA-6j52-38f8-qhxr |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Shopify | shopify_app | >= 22.1.0, < 23.0.3 |
Weakness: CWE-863 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/Shopify/shopify_app/security/advisories/GHSA-6j52-38f8-qhxr x_refsource_CONFIRM
- https://github.com/Shopify/shopify_app/pull/2081 x_refsource_MISC
- https://github.com/Shopify/shopify_app/commit/a09ccc04b9556cbb31c6d56ed81aeb6b9b6c0756 x_refsource_MISC
- https://github.com/Shopify/shopify_app/releases/tag/v23.0.3 x_refsource_MISC