CVE-2026-55795
Craft Commerce: Coupon Code Brute-Force via Rate Limit Bypass
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-307 |
| Vendor | craftcms |
| Product | commerce |
| Published | Sep 14, 2026 |
| Last Updated | Sep 14, 2026 |
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Affected Versions
craftcms / commerce
>= 4.0.0, < 4.11.2 >= 5.0.0, < 5.6.5
References
github.com: https://github.com/craftcms/commerce/security/advisories/GHSA-h5gm-x9wr-vhcm github.com: https://github.com/craftcms/commerce/commit/a7d365cc33dc4c60c543defb3458bcdb5749bc13 github.com: https://github.com/craftcms/commerce/commit/df22c4f9c4ea7fb7857d833f755e49ea6f9f5bb5 github.com: https://github.com/craftcms/commerce/releases/tag/4.11.2 github.com: https://github.com/craftcms/commerce/releases/tag/5.6.5