OpenClaw: Telnyx Webhook Replay Detection Bypass via Base64 Signature Re-encoding

Summary

Telnyx Webhook Replay Detection Bypass via Base64 Signature Re-encoding

Current Maintainer Triage

• Status: narrow
• Normalized severity: low
• Assessment: Shipped v2026.3.28 replay hashing treated equivalent Telnyx Base64/Base64URL signatures as distinct requests, but signature verification still held, so lower to low.

Affected Packages / Versions

• Package: openclaw (npm)
• Latest published npm version: 2026.3.31
• Vulnerable version range: <=2026.3.28
• Patched versions: >= 2026.3.31
• First stable tag containing the fix: v2026.3.31

Fix Commit(s)

• ad77666054651c1fd77b1dc60fd6a8db6600a29a — 2026-03-30T20:01:43+01:00

Release Process Note

• The fix is already present in released version 2026.3.31.
• This draft looks ready for final maintainer disposition or publication, not additional code-fix work.

OpenClaw thanks @AntAISecurityLab for reporting.