CVE-2026-46688 Meeting Room Booking System has an unauthenticated open redirect
An unauthenticated attacker can redirect users to malicious sites via crafted URLs, potentially facilitating phishing attacks against Meeting Room Booking System users.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-46688?
CVE-2026-46688 is a medium-severity vulnerability in meeting-room-booking-system mrbs-code, published on 12 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The Meeting Room Booking System (MRBS) is a PHP-based application for booking meeting rooms. Prior to version 1.12.2, an unauthenticated request can be made to redirect the user to a query-specified location. This allows an attacker to create a specially-crafted URL to an MRBS installation that will cause the user who clicks it to be redirected to the attacker-specified redirect URL, which could be a spoofed MRBS login page, for example. Version 1.12.2 contains a fix. No known workarounds are available.
Weakness: CWE-601
Which versions are affected by CVE-2026-46688?
How do I fix CVE-2026-46688?
No fix has been published for CVE-2026-46688 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-46688 being exploited?
There is no known exploitation of CVE-2026-46688 in the wild and no public exploit code.
Sources
Also known as GHSA-6xcj-g522-859f.