HiEventsDev Hi.Events up to 1.9.0 toctou

Summaryinfo

A vulnerability was found in HiEventsDev Hi.Events up to 1.9.0. It has been rated as problematic. This issue affects some unknown processing. The manipulation leads to toctou. This vulnerability is referenced as CVE-2026-57959. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in HiEventsDev Hi.Events up to 1.9.0 and classified as problematic. This issue affects an unknown function. The manipulation with an unknown input leads to a toctou vulnerability. Using CWE to declare the problem leads to CWE-367. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state. Impacted is integrity. The summary by CVE is:

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.

The weakness was published by George Chen as 1223. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-57959 since 06/26/2026. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-40144). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• HiEventsDev

Name

• Hi.Events

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9.0

Website

• Product: https://github.com/HiEventsDev/Hi.Events/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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