CVE-2026-28461: Openclaw

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

OpenClaw versions prior to 2026.3.1 contain an unbounded memory growth vulnerability in the Zalo webhook endpoint that allows unauthenticated attackers to trigger in-memory key accumulation by varying query strings. Remote attackers can exploit this by sending repeated requests with different query parameters to cause memory pressure, process instability, or out-of-memory conditions that degrade service availability.

Affected products

• Openclaw Openclaw: before 2026.3.1 (fixed in 2026.3.1)

Published 2026-03-19. Last modified 2026-06-17.