CVE-2026-57959
Hi.Events 1.9.0 - Promo Code Max-Usage Bypass via Asynchronous Job Race Condition
Vexday Risk Score
18Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 8.2EPSS —KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
29 Jun 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
Hi.Events through 1.9.0 contains a promo code validation vulnerability where reservation validates usage count before asynchronous UpdateEventStatisticsJob increments it, allowing attackers to redeem limited promo codes unlimited times. Attackers can sequentially reserve multiple orders with the same restricted promo code, each reading order_usage_count=0 and passing validation, then complete them all at discounted prices without concurrent requests.
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
HiEventsDev · Hi.EventsWant to know if your infrastructure is exposed to this?
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