CVE-2026-63414 Shopify App - Broken Access Control

Shopify App 22.1.0 to 23.0.3 contains a broken access control caused by token-exchange authenticated controllers exposing request-derived shop context instead of verified Shopify ID token or session, letting attackers with a valid session token for one shop access or act on another shop's data, exploit requires token-exchange authentication and reliance on current_shopify_domain or params[:shop].

CVSS base score 7.6 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.55% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Broken Access Control, Information Disclosure, Data Tampering
CVSS 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/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
Published
30 October 2026
Updated
1 November 2026
Weakness
CWE-863

Vendor fix

Update to version 23.0.3 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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