# CVE-2026-63414: Shopify App: Token exchange shop context confusion may allow cross-shop authorization bypass in affected apps

Status: published. Published: 2026-10-30. Updated: 2026-11-05.

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.

## Remediation

- fix: shopify_app (rubygems): GitHub reports patched versions 23.0.3. Check the advisory for the affected release branch. (source: GitHub GHSA-6j52-38f8-qhxr) — https://github.com/Shopify/shopify_app/security/advisories/GHSA-6j52-38f8-qhxr
- fix: shopify_app (RubyGems): OSV reports a fixed version 23.0.3. Check the advisory for supported release branches. (source: OSV GHSA-6j52-38f8-qhxr) — https://github.com/advisories/GHSA-6j52-38f8-qhxr

## Affected products and versions

- Shopify / shopify_app: >= 22.1.0, < 23.0.3 (affected). Source: CNA: GitHub_M
-  / shopify_app (shopify_app): >= 22.1.0, < 23.0.3 (affected, GitHub advisory range). Source: GitHub GHSA-6j52-38f8-qhxr
-  / shopify_app (shopify_app): 22.1.0 (affected, RubyGems); 22.2.0 (affected, RubyGems); 22.2.1 (affected, RubyGems); 22.3.0 (affected, RubyGems); 22.3.1 (affected, RubyGems); 22.4.0 (affected, RubyGems); 22.5.0 (affected, RubyGems); 22.5.1 (affected, RubyGems); 22.5.2 (affected, RubyGems); 23.0.0 (affected, RubyGems); 23.0.1 (affected, RubyGems); 23.0.2 (affected, RubyGems); Ecosystem version events: introduced 22.1.0; fixed 23.0.3. Source: OSV GHSA-6j52-38f8-qhxr

## Severity and prioritization

- CVSS 4.0: 7.6 (high); 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; source: CNA: GitHub_M

- CVSS 4.0: 7.6 (high); 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: security-advisories@github.com

- CISA KEV: No listing in collected sources

- EPSS: 0.55% as of 2026-11-04; percentile 46.07%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-863

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/Shopify/shopify_app/security/advisories/GHSA-6j52-38f8-qhxr (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/Shopify/shopify_app/pull/2081 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/Shopify/shopify_app/commit/a09ccc04b9556cbb31c6d56ed81aeb6b9b6c0756 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/Shopify/shopify_app/releases/tag/v23.0.3 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/Shopify/shopify_app/commit/a09ccc04b9556cbb31c6d56ed81aeb6b9b6c0756 (security-advisories@github.com)

- https://github.com/Shopify/shopify_app/pull/2081 (security-advisories@github.com)

- https://github.com/Shopify/shopify_app/releases/tag/v23.0.3 (security-advisories@github.com)

- https://github.com/Shopify/shopify_app/security/advisories/GHSA-6j52-38f8-qhxr (security-advisories@github.com)

- https://github.com/Shopify/shopify_app/security/advisories/GHSA-6j52-38f8-qhxr (GitHub Security Advisories; advisory)

- https://github.com/advisories/GHSA-6j52-38f8-qhxr (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-6j52-38f8-qhxr (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-63414; retrieved 2026-11-05; source updated 2026-11-05

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-63414; retrieved 2026-11-03; source updated 2026-11-02

- GitHub Security Advisories: https://github.com/Shopify/shopify_app/security/advisories/GHSA-6j52-38f8-qhxr; retrieved 2026-11-04; source updated 2026-07-16

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-6j52-38f8-qhxr; retrieved 2026-11-03; source updated 2026-10-29

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-63414; retrieved 2026-11-05; source updated Not reported

Revision: 20519d24c1ad546945d5495333fb6b3ac2cd05901324478971bb2bbd4ba34bcb

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