---
id: CVE-2026-55795
title: Craft Commerce is an ecommerce platform for Craft CMS
summary: >-
  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
  unauthent…
severity: medium
cvss: 6.9
cvssVector: '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
vendor: craftcms
product: commerce
affected:
  - 'commerce >= 4.0.0, < 4.11.2'
  - 'commerce >= 5.0.0, < 5.6.5'
patched:
  - craftcms/commerce 5.6.5
  - craftcms/commerce 4.11.2
published: '2026-09-14'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T20:16:48.050'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55795'
references:
  - url: >-
      https://github.com/craftcms/commerce/commit/a7d365cc33dc4c60c543defb3458bcdb5749bc13
    label: security-advisories@github.com
  - url: >-
      https://github.com/craftcms/commerce/commit/df22c4f9c4ea7fb7857d833f755e49ea6f9f5bb5
    label: security-advisories@github.com
  - url: 'https://github.com/craftcms/commerce/releases/tag/4.11.2'
    label: security-advisories@github.com
  - url: 'https://github.com/craftcms/commerce/releases/tag/5.6.5'
    label: security-advisories@github.com
  - url: >-
      https://github.com/craftcms/commerce/security/advisories/GHSA-h5gm-x9wr-vhcm
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-h5gm-x9wr-vhcm'
tags:
  - nvd
  - cve.org
  - ghsa
  - composer
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-14T19:22:16.524924Z'
cvssSource: cna
ecosystem: composer
ingestedAt: '2026-06-22T13:35:24.357Z'
epss: 0.00512
epssPercentile: 0.41188
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-55795)

Affected packages:

- `craftcms/commerce >= 5.0.0, <= 5.6.4`
- `craftcms/commerce >= 4.0.0, <= 4.11.1`

Patched in:

- `craftcms/commerce 5.6.5`
- `craftcms/commerce 4.11.2`

Source: https://github.com/advisories/GHSA-h5gm-x9wr-vhcm