{"id":"CVE-2026-55795","summary":"Craft Commerce: Coupon Code Brute-Force via Rate Limit Bypass","details":"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.","aliases":["GHSA-h5gm-x9wr-vhcm"],"modified":"2026-09-16T03:47:03.063729390Z","published":"2026-09-14T15:55:14Z","database_specific":{"cwe_ids":["CWE-307"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55795.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/craftcms/commerce/releases/tag/4.11.2"},{"type":"WEB","url":"https://github.com/craftcms/commerce/releases/tag/5.6.5"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55795.json"},{"type":"ADVISORY","url":"https://github.com/craftcms/commerce/security/advisories/GHSA-h5gm-x9wr-vhcm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55795"},{"type":"FIX","url":"https://github.com/craftcms/commerce/commit/a7d365cc33dc4c60c543defb3458bcdb5749bc13"},{"type":"FIX","url":"https://github.com/craftcms/commerce/commit/df22c4f9c4ea7fb7857d833f755e49ea6f9f5bb5"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/craftcms/commerce","events":[{"introduced":"03fe68b8a09d05b028c510411b55af6cea6a089a"},{"introduced":"266ccfd800264c4a0a7c22447112c097b0af7bae"},{"fixed":"bccb7fd016038ccd5ae4dd74fbc4d704ca81e4f0"},{"fixed":"fe70f81138ff3730feb4d827ac4641fb6dfd51d4"},{"fixed":"a7d365cc33dc4c60c543defb3458bcdb5749bc13"},{"fixed":"df22c4f9c4ea7fb7857d833f755e49ea6f9f5bb5"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"4.0.0"},{"fixed":"4.11.2"},{"introduced":"5.0.0"},{"fixed":"5.6.5"}]}}],"versions":["5.6.4","5.6.2","5.6.1.1","5.6.1","5.6.0","5.5.4","5.5.3","5.5.2","5.5.1","5.5.0.1","5.5.0","5.4.10","5.4.9","5.4.8","5.4.7.1","5.4.7","5.4.6","5.4.5.1","5.4.5","5.4.4","5.4.3","5.4.2","5.4.1.1","5.4.1","5.4.0","5.3.13","5.3.12","5.3.11","5.3.10","5.3.8","5.3.7","5.3.6","5.3.5","5.3.4","5.3.3","5.3.2.2","5.3.2.1","5.3.2","5.3.1","5.3.0.2","5.3.0.1","5.3.0","5.2.12.1","5.2.12","5.2.11","5.2.10","5.2.9.1","5.2.9","5.2.8","5.2.5","5.2.4","5.2.3","5.2.2.1","5.2.2","5.2.1","5.2.0","5.1.4","5.1.3","5.1.2","5.1.0.1","5.1.0","5.0.19","5.0.18","5.0.17","5.0.16.2","5.0.16.1","5.0.16","5.0.15","5.0.14","5.0.11","5.0.13","5.0.12.1","5.0.12","5.0.11.1","5.0.10.1","5.0.10","5.0.9","5.0.8","5.0.7","5.0.6","5.0.5","5.0.4","5.0.3","5.0.2","5.0.1","5.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55795.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","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"}]}