CVE-2026-121628: medium-severity vulnerability in bagisto
Bagisto before 2.3.16 and 2.4.x before 2.4.1 Race Condition in Coupon Usage Accounting
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 6.3epss 0.3%
Bagisto before 2.3.16 and 2.4.x before 2.4.1 contains a race condition vulnerability in manageCartRule() that allows attackers to redeem single-use coupons multiple times. Attackers can submit concurrent order requests to the onepage orders checkout endpoint, bypassing unlocked times_used checks to apply discounts repeatedly.
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Affected products
bagisto · bagistopublic PoCs found — 1
cve_referencegist.github.com/Ayxpp/5358d9fff045e94e0ddb51677ed5d195unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — bagisto
In the same product, most dangerous first.
CVE-2026-21450HIGHBagisto has SSTI in parameter that can lead to RCEEPSS 1.4%CVE-2026-21448HIGHBagisto has Normal & Blind SSTI from low-privilege user when ordering productEPSS 0.9%CVE-2026-21446HIGHBagisto Missing Authentication on Installer API EndpointsEPSS 0.6%CVE-2026-21451MEDIUMBagisto has HTML Filter Bypass that Enables Stored XSSEPSS 0.6%CVE-2026-21449HIGHBagisto has SSTI via first and last name from low-privilege user (not admin)EPSS 0.5%CVE-2025-62416MEDIUMbagisto - Server Side Template Injection (SSTI) in Product DescriptionEPSS 0.4%
References
https://gist.github.com/Ayxpp/5358d9fff045e94e0ddb51677ed5d195https://github.com/bagisto/bagistohttps://github.com/bagisto/bagisto/blob/v2.4.0/packages/Webkul/CartRule/src/Listeners/Order.php#L30-L95https://github.com/bagisto/bagisto/commit/1f57c10eb9cb61b37de4706ffa439fd26aa7c405https://github.com/bagisto/bagisto/commit/81cb2a2a35b355492f704fd216d679f2145a5650https://github.com/bagisto/bagisto/releases/tag/v2.3.16https://github.com/bagisto/bagisto/releases/tag/v2.4.1https://www.vulncheck.com/advisories/bagisto-before-2.3.16-and-2.4-x-before-2.4.1-race-condition-in-coupon-usage-accounting