{"id":"CVE-2026-56831","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-56831","generatedAt":"2026-10-28T03:30:37.796Z","title":"Shopper is a Headless e-commerce Admin Panel.","description":"Shopper is a Headless e-commerce Admin Panel. Prior to 2.9.0, the /cpanel/discounts administrative interface accepts negative fixed_amount discount values, persists them in sh_discounts, and passes them through vendor/shopper/cart/src/Discounts/DiscountCalculator.php and vendor/shopper/cart/src/Pipelines/Calculate.php without enforcing a positive-value invariant. Because the calculation subtracts discountTotal from the subtotal, a negative discount increases the resulting order total instead of reducing it. Malformed discount records can therefore cause incorrect pricing and financial data integrity failures, although the advisory does not establish a customer-facing exploitation path. This issue is fixed in version 2.9.0.","published":"2026-09-15T18:17:25.000Z","lastModified":"2026-09-30T17:51:56.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"},"cwe":["CWE-20"],"affected":[],"epss":{"score":0.00435,"percentile":0.37578,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.43%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/shopperlabs/shopper/commit/967e616281ded1a0050d9102858ecd7dd7f66a41","source":"security-advisories@github.com"},{"url":"https://github.com/shopperlabs/shopper/pull/528","source":"security-advisories@github.com"},{"url":"https://github.com/shopperlabs/shopper/releases/tag/v2.9.0","source":"security-advisories@github.com"},{"url":"https://github.com/shopperlabs/shopper/security/advisories/GHSA-5vf4-452p-jjhf","source":"security-advisories@github.com"},{"url":"https://github.com/shopperlabs/shopper/security/advisories/GHSA-5vf4-452p-jjhf","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-56831","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}