CVE-2026-41351

Medium

Description

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.

SeverityMedium

CVSS5.3

Exploit probability—

ProductOpenclaw

PublishedApr 23, 2026

First seenApr 23, 2026

Weakness typeCWE-294CWE-294

How to fix

Update

openclaw openclaw2026.3.31 or later
openclaw2026.3.31 or later

Patches

github.com/openclaw/openclaw/commit/ad77666054651c1fd77b1dc60fd6a8db6600a29a

Vendor advisories

github.com/openclaw/openclaw/security/advisories/GHSA-37v6-fxx8-xjmx

Affected products

Product	Affected versions	Fixed in
openclaw openclaw	v < 2026.3.31	2026.3.31
openclawnpm	v < 2026.3.31	2026.3.31

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