Vulnerability-Lookup

GHSA-H5GM-X9WR-VHCM

Vulnerability from github – Published: 2026-06-19 21:15 – Updated: 2026-06-19 21:15

Summary

Craft Commerce: Coupon Code Brute-Force via Rate Limit Bypass

Details

Summary

The CartController defines a RateLimiter behavior that is only activated when the 'number' POST/GET parameter is explicitly provided.

Details

When an attacker submits coupon codes against the session-based cart (without passing a 'number' parameter), no rate limiting is applied. This allows unlimited attempts to guess coupon codes.

Vulnerable Code resim

resim

PoC

Complete instructions, including specific configuration details, to reproduce the vulnerability.

resim

Impact

An attacker can enumerate all coupon codes through automated requests.

Remediation Apply rate limiting unconditionally on actionUpdateCart regardless of whether 'number' is present.

Severity

6.9 (Medium)


                  
                    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

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JSON

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{
  "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"
}

CVE-2026-55795 (GCVE-0-2026-55795)

Vulnerability from cvelistv5 – Published: 2026-09-14 15:55 – Updated: 2026-09-14 20:06

Title

Craft Commerce: Coupon Code Brute-Force via Rate Limit Bypass

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 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.

Severity

6.9 (Medium)


                        
                          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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-14 19:22 UTC

CWE

CWE-307 - Improper Restriction of Excessive Authentication Attempts

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7814 records in the last 180 days details

References

5 references

URL	Tags
https://github.com/craftcms/commerce/security/adv…	x_refsource_CONFIRM
https://github.com/craftcms/commerce/commit/a7d36…	x_refsource_MISC
https://github.com/craftcms/commerce/commit/df22c…	x_refsource_MISC
https://github.com/craftcms/commerce/releases/tag…	x_refsource_MISC
https://github.com/craftcms/commerce/releases/tag/5.6.5	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
craftcms	commerce	Affected: >= 4.0.0, < 4.11.2 Affected: >= 5.0.0, < 5.6.5

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-55795",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-14T19:22:16.524924Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-14T20:06:54.939Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "commerce",
          "vendor": "craftcms",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 4.0.0, \u003c 4.11.2"
            },
            {
              "status": "affected",
              "version": "\u003e= 5.0.0, \u003c 5.6.5"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-307",
              "description": "CWE-307: Improper Restriction of Excessive Authentication Attempts",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T15:55:14.000Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/craftcms/commerce/security/advisories/GHSA-h5gm-x9wr-vhcm",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/craftcms/commerce/security/advisories/GHSA-h5gm-x9wr-vhcm"
        },
        {
          "name": "https://github.com/craftcms/commerce/commit/a7d365cc33dc4c60c543defb3458bcdb5749bc13",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/craftcms/commerce/commit/a7d365cc33dc4c60c543defb3458bcdb5749bc13"
        },
        {
          "name": "https://github.com/craftcms/commerce/commit/df22c4f9c4ea7fb7857d833f755e49ea6f9f5bb5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/craftcms/commerce/commit/df22c4f9c4ea7fb7857d833f755e49ea6f9f5bb5"
        },
        {
          "name": "https://github.com/craftcms/commerce/releases/tag/4.11.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/craftcms/commerce/releases/tag/4.11.2"
        },
        {
          "name": "https://github.com/craftcms/commerce/releases/tag/5.6.5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/craftcms/commerce/releases/tag/5.6.5"
        }
      ],
      "source": {
        "advisory": "GHSA-h5gm-x9wr-vhcm",
        "discovery": "UNKNOWN"
      },
      "title": "Craft Commerce: Coupon Code Brute-Force via Rate Limit Bypass"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-55795",
    "datePublished": "2026-09-14T15:55:14.000Z",
    "dateReserved": "2026-06-17T14:40:28.380Z",
    "dateUpdated": "2026-09-14T20:06:54.939Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-H5GM-X9WR-VHCM

Summary

Details

PoC

Impact

CVE-2026-55795 (GCVE-0-2026-55795)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour