CVE-2026-55795
Published:September 14, 2026
Updated:September 22, 2026
Craft Commerce is an ecommerce platform for Craft CMS. From 4.0.0 until 4.11.2 and 5.6.5, CartController in src/controllers/CartController.php activates its RateLimiter only when the number POST or GET parameter is supplied. An unauthenticated attacker can submit couponCode values to actionUpdateCart for the session-based cart while omitting number, preventing creation of the IP rate-limit identity and allowing unlimited automated coupon-code guessing and enumeration. This issue is fixed in versions 4.11.2 and 5.6.5.
Affected Packages
https://github.com/craftcms/commerce.git (GITHUB):
Affected version(s) >=4.0.0 <4.11.2Fix Suggestion:
Update to version 4.11.2https://github.com/craftcms/commerce.git (GITHUB):
Affected version(s) >=5.0.0 <5.6.5Fix Suggestion:
Update to version 5.6.5craftcms/commerce (PHP):
Affected version(s) >=4.0.0 <4.11.2Fix Suggestion:
Update to version 4.11.2craftcms/commerce (PHP):
Affected version(s) >=5.0.0 <5.6.5Fix Suggestion:
Update to version 5.6.5Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Improper Restriction of Excessive Authentication Attempts
EPSS
Base Score:
0.29