Medium 6.9Published Sep 14, 2026

CVE-2026-55795Craft Commerce: Coupon Code Brute-Force via Rate Limit Bypass

Updated under an hour ago (2026-10-19 10:10 UTC)

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It affects craftcms commerce. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for craftcms commerce

Exploited in the last 30 days

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.

CVSS: 6.9 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-307
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

craftcms commerce craftcms:commerce (from the name)	from 4.0.0, < 4.11.2; from 5.0.0, < 5.6.5	CNA record

References

https://github.com/craftcms/commerce/security/advisories/GHSA-h5gm-x9wr-vhcmx-refsource-confirm
https://github.com/craftcms/commerce/commit/a7d365cc33dc4c60c543defb3458bcdb5749bc13x-refsource-misc
https://github.com/craftcms/commerce/commit/df22c4f9c4ea7fb7857d833f755e49ea6f9f5bb5x-refsource-misc
https://github.com/craftcms/commerce/releases/tag/4.11.2x-refsource-misc
https://github.com/craftcms/commerce/releases/tag/5.6.5x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.