CVE-2026-41351: Openclaw

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

OpenClaw before 2026.3.31 contains a replay detection bypass vulnerability in webhook signature handling that treats Base64 and Base64URL encoded signatures as distinct requests. Attackers can re-encode Telnyx webhook signatures to bypass replay detection while maintaining valid signature verification.

Affected products

• Openclaw Openclaw: before 2026.3.31 (fixed in 2026.3.31)

Published 2026-04-23. Last modified 2026-06-17.