{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 5.6.4"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "craftcms/commerce"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0"
            },
            {
              "fixed": "5.6.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.11.1"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "craftcms/commerce"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0"
            },
            {
              "fixed": "4.11.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-55795"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-307"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-19T21:15:26Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nThe CartController defines a RateLimiter behavior that is only activated when the \u0027number\u0027 POST/GET parameter is explicitly provided.\n\n### Details\n\nWhen an attacker submits coupon codes against the session-based cart (without passing a \u0027number\u0027 parameter), no rate limiting is applied. This allows unlimited attempts to guess coupon codes.\n\n**Vulnerable Code**\n\u003cimg width=\"864\" height=\"90\" alt=\"resim\" src=\"https://github.com/user-attachments/assets/a5197f10-f1fd-4331-93f9-9479d0ceebba\" /\u003e\n\n\u003cimg width=\"881\" height=\"272\" alt=\"resim\" src=\"https://github.com/user-attachments/assets/d9db963f-5d1f-4b00-a4b4-5f2dfe2b71dd\" /\u003e\n\n\u003cimg width=\"861\" height=\"271\" alt=\"resim\" src=\"https://github.com/user-attachments/assets/f7842493-3bc0-4e99-956c-7266bab15703\" /\u003e\n\n### PoC\nComplete instructions, including specific configuration details, to reproduce the vulnerability.\n\n\u003cimg width=\"909\" height=\"171\" alt=\"resim\" src=\"https://github.com/user-attachments/assets/cfc8c994-5e0c-48de-b728-464029beba0e\" /\u003e\n\n### Impact\nAn attacker can enumerate all coupon codes through automated requests.\n\n**Remediation**\nApply rate limiting unconditionally on actionUpdateCart regardless of whether \u0027number\u0027 is present.",
  "id": "GHSA-h5gm-x9wr-vhcm",
  "modified": "2026-06-19T21:15:26Z",
  "published": "2026-06-19T21:15:26Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/commerce/security/advisories/GHSA-h5gm-x9wr-vhcm"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/commerce/commit/df22c4f9c4ea7fb7857d833f755e49ea6f9f5bb5"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/craftcms/commerce"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Craft Commerce: Coupon Code Brute-Force via Rate Limit Bypass"
}