GHSA-78vr-q6cf-c7p6: Craft Commerce Partial Payment Amount Without Lower Vulnerability

MODERATE
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CWE-1284 CWE-20
Published
Advisory Summary

GHSA-78vr-q6cf-c7p6 is a MODERATE partial payment amount without lower vulnerability (CWE-1284: Improper Validation of Specified Quantity in Input) affecting Craft Commerce libraries in the Packagist ecosystem. The issue involves partial payment amount without lower bound validation. Remediation is available by upgrading affected packages to version 5.6.5, 4.11.2.

GHSA-78vr-q6cf-c7p6 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-78vr-q6cf-c7p6
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-1284: Improper Validation of Specified Quantity in Input
Affected Product Craft Commerce
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix GHSA-78vr-q6cf-c7p6

To remediate this vulnerability, upgrade all affected Craft Commerce dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

craftcms/commerce fixed: 5.6.5 
Upgrade craftcms/commerce to 5.6.5
craftcms/commerce fixed: 4.11.2 
Upgrade craftcms/commerce to 4.11.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for craftcms/commerce

How to Check if You Are Affected

To determine whether your application is affected by GHSA-78vr-q6cf-c7p6, inspect your project dependencies for Craft Commerce:

inspect dependencies for craftcms/commerce

Analyze the terminal output to locate any version of Craft Commerce in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.6.5), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-1284: Improper Validation of Specified Quantity in Input, where the product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties. In Craft Commerce, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary The `Order::setPaymentAmount()` method accepts any float value without enforcing a minimum positive amount. The PaymentsController casts the user-supplied 'paymentAmount' parameter directly to float with no lower-bound check. ### Details When the store has 'Allow Partial Payment on Checkout' enabled, a user can submit a payment amount of $0.00 or even a negative value, potentially marking orders as paid without a valid transaction. <img width="690" height="80" alt="image" src="https://github.com/user-attachments/assets/78b653a6-ccae-4ce4-b71b-fc38a7757d73" /> <img width="761" height="200" alt="image" src="https://github.com/user-attachments/assets/665a235f-62c2-45fe-aa41-c3f266881c77" /> ### PoC _Complete instructions, including specific configuration details, to reproduce the vulnerability._ <img width="606" height="144" alt="image" src="https://github.com/user-attachments/assets/a04a6de2-7c5f-4837-aed6-58756e246b80" /> ### Impact On stores with partial payment enabled, a customer may be able to set an arbitrarily small payment amount. Gateway behavior varies — some will process $0.00 transactions, effectively giving free order fulfillment. **Remediation** <img width="718" height="98" alt="image" src="https://github.com/user-attachments/assets/aa64b696-9749-45e4-97f6-8d7299cdf1d6" />

GHSA-78vr-q6cf-c7p6 Affected Craft Commerce Versions

2 component(s)
Fixed Versions:
5.6.54.11.2
Product / Package Ecosystem Affected Versions Fixed Version
craftcms/commerce
 Packagist
≥ 5.0.0
< 5.6.5
5.6.5
craftcms/commerce
 Packagist
≥ 4.0.0
< 4.11.2
4.11.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/craftcms/commerce/security/advisories/GHSA-78vr-q6cf-c7p6
Security Fix Commit FIX COMMIT
https://github.com/craftcms/commerce/commit/9a88392b3074aa132a9455d4f4b582411df52c74
Craft Commerce Source Repository REPOSITORY
https://github.com/craftcms/commerce

Frequently Asked Questions

What is GHSA-78vr-q6cf-c7p6?
GHSA-78vr-q6cf-c7p6 is a security vulnerability in Craft Commerce involving Partial Payment Amount Without Lower Bound Validation under CWE-1284: Improper Validation of Specified Quantity in Input.
Which Craft Commerce versions are affected?
Affected versions include releases prior to 5.6.5, 4.11.2 across affected packages: craftcms/commerce.
What version fixes GHSA-78vr-q6cf-c7p6?
Upgrading to 5.6.5, 4.11.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is craftcms/commerce affected?
Yes, craftcms/commerce is affected in releases prior to 5.6.5, 4.11.2. Upgrade your dependency to 5.6.5, 4.11.2 or later.
What CWE is associated with GHSA-78vr-q6cf-c7p6?
GHSA-78vr-q6cf-c7p6 is classified under CWE-1284: Improper Validation of Specified Quantity in Input (The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.).
How can I check Packagist dependencies for GHSA-78vr-q6cf-c7p6?
Run the dependency tree command: 'inspect dependencies for craftcms/commerce'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-78vr-q6cf-c7p6",
  "modified" : "2026-06-19T21:15:23Z",
  "published" : "2026-06-19T21:15:23Z",
  "aliases" : [ ],
  "summary" : "Craft Commerce: Partial Payment Amount Without Lower Bound Validation",
  "details" : "### Summary\n\nThe `Order::setPaymentAmount()` method accepts any float value without enforcing a minimum positive amount. The PaymentsController casts the user-supplied 'paymentAmount' parameter directly to float with no lower-bound check. \n\n### Details\n\nWhen the store has 'Allow Partial Payment on Checkout' enabled, a user can submit a payment amount of $0.00 or even a negative value, potentially marking orders as paid without a valid transaction.\n\n<img width=\"690\" height=\"80\" alt=\"image\" src=\"https://github.com/user-attachments/assets/78b653a6-ccae-4ce4-b71b-fc38a7757d73\" />\n\n<img width=\"761\" height=\"200\" alt=\"image\" src=\"https://github.com/user-attachments/assets/665a235f-62c2-45fe-aa41-c3f266881c77\" />\n\n### PoC\n\n_Complete instructions, including specific configuration details, to reproduce the vulnerability._\n<img width=\"606\" height=\"144\" alt=\"image\" src=\"https://github.com/user-attachments/assets/a04a6de2-7c5f-4837-aed6-58756e246b80\" />\n\n\n### Impact\nOn stores with partial payment enabled, a customer may be able to set an arbitrarily small payment amount. Gateway behavior varies — some will process $0.00 transactions, effectively giving free order fulfillment.\n\n**Remediation**\n\n<img width=\"718\" height=\"98\" alt=\"image\" src=\"https://github.com/user-attachments/assets/aa64b696-9749-45e4-97f6-8d7299cdf1d6\" />",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "craftcms/commerce"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "5.0.0"
      }, {
        "fixed" : "5.6.5"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 5.6.4"
    }
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "craftcms/commerce"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0"
      }, {
        "fixed" : "4.11.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 4.11.1"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/commerce/security/advisories/GHSA-78vr-q6cf-c7p6"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/commerce/commit/9a88392b3074aa132a9455d4f4b582411df52c74"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/craftcms/commerce"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1284", "CWE-20" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-19T21:15:23Z",
    "nvd_published_at" : null
  }
}