Shopify App token exchange flaw lets attackers reach other shops
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-863.
Summary
The shopify_app Rails engine for Shopify applications, from 22.1.0 before 23.0.3, has an incorrect authorization flaw (CWE-863) in its token-exchange authenticated controllers. The request-derived shop query parameter can override the identity from a verified Shopify ID token or active session, so a request authenticated for one shop can make application code treat another shop as current. An attacker with a valid Shopify session token for one shop can supply a different shop parameter to potentially access unauthorized application data or perform shop-scoped actions, depending on the application's authorization model.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
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 |
|---|---|---|---|---|---|
| remix-run | shopify_app | 22.1.0 to before 23.0.3 | 23.0.3 | Patch available | CNA |
| — | shopify_app (RubyGems) | 22.1.0 to before 23.0.3 | 23.0.3 | Patch available | GHSA-6j52-38f8-qhxr |
- shopify_app Vendorremix-run Affected 22.1.0 to before 23.0.3 Fixed in 23.0.3 Patch available CNA
- shopify_app (RubyGems) Vendor— Affected 22.1.0 to before 23.0.3 Fixed in 23.0.3 Patch available GHSA-6j52-38f8-qhxr
Remediation
Update shopify_app to version 23.0.3, which fixes this issue in both the Shopify and RubyGems distributions of the package.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
- Fix · CNA shopify_app (Shopify) Fixed in 23.0.3
- Fix · GHSA-6j52-38f8-qhxr shopify_app (RubyGems) Fixed in 23.0.3 Advisory →
Vendor assessments
Timeline
- 2026-10-30 Threatist record created from CVE-2026-63414
- 2026-11-01 Priority changed: MEDIUM → LOW
- 2026-11-05 EPSS moved to the 50th–90th percentile
- 2026-11-05 CISA SSVC decision points changed
- 2026-11-06 Affected versions changed · Red Hat
- 2026-11-06 CVSS score added · Red Hat
References
Other 5
- https://github.com/Shopify/shopify_app/security/advisories/GHSA-6j52-38f8-qhxr
- https://github.com/Shopify/shopify_app/pull/2081
- https://github.com/Shopify/shopify_app/commit/a09ccc04b9556cbb31c6d56ed81aeb6b9b6c0756
- https://github.com/Shopify/shopify_app/releases/tag/v23.0.3
- https://github.com/Shopify/shopify_app
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Sources
- CVE-2026-63414 · CVE Program
- CVE-2026-63414 · NVD
- FIRST EPSS
- CVE-2026-63414 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences