🛡️ CVE-2026-55795 — commerce

⚪ Unknown ✅ No Known Exploit CWE-307 OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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

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

<img width="864" height="90" alt="resim" src="https://github.com/user-attachments/assets/a5197f10-f1fd-4331-93f9-9479d0ceebba" />

<img width="881" height="272" alt="resim" src="https://github.com/user-attachments/assets/d9db963f-5d1f-4b00-a4b4-5f2dfe2b71dd" />

<img width="861" height="271" alt="resim" src="https://github.com/user-attachments/assets/f7842493-3bc0-4e99-956c-7266bab15703" />

PoC

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

<img width="909" height="171" alt="resim" src="https://github.com/user-attachments/assets/cfc8c994-5e0c-48de-b728-464029beba0e" />

Impact

An attacker can enumerate all coupon codes through automated requests.

Remediation

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

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. Rated impact: confidentiality low, integrity none, availability none.

Weakness class

CVE-2026-55795 is classified as CWE-307: Improper Restriction of Excessive Authentication Attempts. Repeated login attempts are not limited, leaving credentials open to brute forcing.

Affected software

CVE-2026-55795 is recorded against 1 package.

  • craftcms/commerce (from 4.0.0 up to 4.11.2)

Timeline and source

Published on 19 June 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

github.com (Web)
github.com (Web)
github.com (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector 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
CWE CWE-307
Public Exploit ✅ No
Source OSV
Published 2026-06-19
Updated 2026-08-12
Modified 2026-06-19
Fix URL N/A

Affected Packages

Software From version Fixed in
craftcms/commerce 4.0.0 4.11.2

Similar Threats

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