CVE-2026-57960 Hi.Events 1.9.0 - Unauthenticated Attendee PII Exposure via Check-in List short_id
Unauthenticated attackers can access and modify attendee PII in Hi.Events by guessing the short_id of public check-in lists.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-57960?
CVE-2026-57960 is a high-severity missing authorization vulnerability in HiEventsDev Hi.Events, published on 29 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Hi.Events through 1.9.0 public check-in list endpoints use short_id as sole access control, allowing unauthenticated access to retrieve full attendee lists including emails and personal information. Attackers with knowledge of the short_id can call GET /api/public/check-in-lists/{short_id}/attendees to read attendee data and create or delete check-in records without authentication.
Weakness: CWE-359
Which versions are affected by CVE-2026-57960?
How do I fix CVE-2026-57960?
No fix has been published for CVE-2026-57960 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-57960 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-57960 exists.
Sources
Also known as GHSA-5v9v-qj76-f3m4.