What is CVE-2026-57959?

CVE-2026-57959 is a medium-severity vulnerability in Hieventsdev Hi.events, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.9/10. Published 2026-06-29.

How severe is CVE-2026-57959?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Hieventsdev Hi.events

CVE-2026-57959

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. At…

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Hieventsdev Hi.events — versions 0

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-57959?: CVE-2026-57959 is a medium-severity vulnerability in Hieventsdev Hi.events, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.9/10. Published 2026-06-29.
How severe is CVE-2026-57959?: Medium severity. CVSS v3 base score is 5.9 out of 10.