CraftCMS Commerce up to 4.11.1/5.6.4 RateLimiter CartController.php actionUpdateCart number improper authentication

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.30

Summaryinfo

A vulnerability, which was classified as critical, has been found in CraftCMS Commerce up to 4.11.1/5.6.4. This vulnerability affects the function actionUpdateCart of the file src/controllers/CartController.php of the component RateLimiter. Performing a manipulation of the argument number results in improper authentication. This vulnerability was named CVE-2026-55795. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in CraftCMS Commerce up to 4.11.1/5.6.4. It has been classified as critical. This affects the function actionUpdateCart of the file src/controllers/CartController.php of the component RateLimiter. The manipulation of the argument number with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-55795 since 06/17/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

By approaching the search of inurl:src/controllers/CartController.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 4.11.2 or 5.6.5 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Google Hack: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Commerce 4.11.2/5.6.5

Timelineinfo

06/17/2026 CVE reserved
09/14/2026 +89 days Advisory disclosed
09/14/2026 +0 days VulDB entry created
09/14/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-55795 (🔒)
GCVE (CVE): GCVE-0-2026-55795
GCVE (VulDB): GCVE-100-403593

Entryinfo

Created: 09/14/2026 18:15
Changes: 09/14/2026 18:15 (70)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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