AI agent vulnerability · OpenClaw

CVE-2026-41351: OpenClaw: Telnyx Webhook Replay Detection Bypass via Base64 Signature Re-encoding

mediumCVSS 4.0 6.3 · 3.1 5.3GHSA-37v6-fxx8-xjmx

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.

Published Apr 3, 2026 · Updated May 6, 2026

Affected packages

openclaw

Ecosystem: npm
Affected: <= 2026.3.28
Fixed in: 2026.3.31
Check: npm ls openclaw

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

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.

Credited to AntAISecurityLab.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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