CVE-2021-42076: Barrier Project Barrier

High severity, CVSS 7.5. EPSS: 1.6% chance of exploitation in the next 30 days.

An issue was discovered in Barrier before 2.3.4. An attacker can cause memory exhaustion in the barriers component (aka the server-side implementation of Barrier) and barrierc by sending long TCP messages.

Affected products

• Barrier Project Barrier: before 2.3.4 (fixed in 2.3.4)

Published 2021-11-08. Last modified 2026-06-17.