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CVE-2026-57959— Hi.Events 1.9.0 - Promo Code Max-Usage Bypass via Asynchronous Job Race Condition

Quick assessment

Affected
HiEventsDev Hi.Events
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hi.Events是Hi.Events组织的一个活动票务与管理平台。 Hi.Events 1.9.0及之前版本存在竞争条件问题漏洞，该漏洞源于竞争条件引发促销码验证问题，导致订单在异步作业更新使用计数前验证使用次数，攻击者可无限次使用受限促销码以折扣价完成多个订单。

CVSS 5.9 · Medium EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
HiEventsDev Hi.Events ≤ 1.9.0 affected
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I. Basic Information for CVE-2026-57959

Vulnerability Information
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Vulnerability Title
Hi.Events 1.9.0 - Promo Code Max-Usage Bypass via Asynchronous Job Race Condition
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5
Vulnerability Title
Hi.Events 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hi.Events是Hi.Events组织的一个活动票务与管理平台。 Hi.Events 1.9.0及之前版本存在竞争条件问题漏洞，该漏洞源于竞争条件引发促销码验证问题，导致订单在异步作业更新使用计数前验证使用次数，攻击者可无限次使用受限促销码以折扣价完成多个订单。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
HiEventsDev Hi.Events 0 ~ 1.9.0 -

II. Public POCs for CVE-2026-57959

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III. Intelligence Information for CVE-2026-57959

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Vendor Advisories for CVE-2026-57959 (1)

Proof of Concept for CVE-2026-57959 (1)

IV. Related Vulnerabilities

Same product: Hi.Events
Same vendor: HiEventsDev
Same weakness: CWE-367

V. Comments for CVE-2026-57959

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