Race condition in eLabFTW - #VU137351
Published: July 12, 2026
Vulnerability identifier: #VU137351
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass exclusive booking restrictions.
The vulnerability exists due to a race condition in the scheduler booking system when handling multiple concurrent booking requests for the same resource and time slot. A remote user can send concurrent requests to bypass exclusive booking restrictions.
The issue affects enforcement of the book_can_overlap=0 policy for exclusive bookings.
Affected software
eLabFTW
Remediation
Install security update from vendor's website.
eLabFTW - update to 5.6.0