Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The shopify_app RubyGems package, versions 22.1.0 up to but not including 23.0.3, can let a request authenticated for one shop be treated as another shop when it includes a different shop query parameter. An attacker holding a valid Shopify session token for one shop could reach shop-scoped data or actions of another shop, if the application relied on current_shopify_domain or params[:shop] for authorization or tenant lookup. Upgrade to shopify_app 23.0.3, which rejects mismatched requests with 401 Unauthorized.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.6 | High | 4.0 | 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 | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0075, the 55th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 30 Oct 2026, 22:49 UTC Confirmed by the CVE List
- 30 Oct 2026, 23:17 UTC Confirmed by NVD
- 31 Oct 2026, 14:21 UTC First seen by agentprime
- 31 Oct 2026, 14:21 UTC Confirmed by OSV