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CVE-2026-55795— Craft Commerce: Coupon Code Brute-Force via Rate Limit Bypass

Quick assessment

Affected
craftcms commerce
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

CraftCMS commerce是CraftCMS公司的一款为内容管理系统提供电商功能的插件。 CraftCMS commerce 4.0.0版本至4.11.2之前版本和5.0.0版本至5.6.5之前版本存在授权问题漏洞，该漏洞源于CartController仅在提供number参数时激活RateLimiter，未认证攻击者可省略number提交couponCode，绕过IP速率限制，导致无限自动化猜测和枚举优惠券代码。

CVSS 6.9 · Medium EPSS 0.51% · P44

Affected Version Matrix 2

VendorProduct Version RangeStatus
craftcms commerce >= 4.0.0, < 4.11.2 affected
>= 5.0.0, < 5.6.5 affected
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I. Basic Information for CVE-2026-55795

Vulnerability Information
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Vulnerability Title
Craft Commerce: Coupon Code Brute-Force via Rate Limit Bypass
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
过多认证尝试的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
CraftCMS commerce 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CraftCMS commerce是CraftCMS公司的一款为内容管理系统提供电商功能的插件。 CraftCMS commerce 4.0.0版本至4.11.2之前版本和5.0.0版本至5.6.5之前版本存在授权问题漏洞，该漏洞源于CartController仅在提供number参数时激活RateLimiter，未认证攻击者可省略number提交couponCode，绕过IP速率限制，导致无限自动化猜测和枚举优惠券代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
craftcms commerce >= 4.0.0, < 4.11.2 -

II. Public POCs for CVE-2026-55795

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III. Intelligence Information for CVE-2026-55795

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Patches & Fixes for CVE-2026-55795 (2)

Vendor Advisories for CVE-2026-55795 (1)

Vendor Pages for CVE-2026-55795 (2)

IV. Related Vulnerabilities

Same product: commerce
Same vendor: craftcms
Same weakness: CWE-307