# CVE-2026-55795

## Summary

- **CVE ID:** CVE-2026-55795
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-307
- **Published:** Sep 14, 2026
- **Last Modified:** Sep 14, 2026

## Description

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 Products

- craftcms — commerce (>= 4.0.0, < 4.11.2)
- craftcms — commerce (>= 5.0.0, < 5.6.5)

## References

- [CNA](https://github.com/craftcms/commerce/security/advisories/GHSA-h5gm-x9wr-vhcm)
- [CNA](https://github.com/craftcms/commerce/commit/a7d365cc33dc4c60c543defb3458bcdb5749bc13)
- [CNA](https://github.com/craftcms/commerce/commit/df22c4f9c4ea7fb7857d833f755e49ea6f9f5bb5)
- [CNA](https://github.com/craftcms/commerce/releases/tag/4.11.2)
- [CNA](https://github.com/craftcms/commerce/releases/tag/5.6.5)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.29%
- **EPSS Percentile:** 22.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._