CVE-2026-41351

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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/openclaw/openclaw/commit/ad77666054651c1fd77b1dc60fd6a8db6600a29a	Patch
https://github.com/openclaw/openclaw/security/advisories/GHSA-37v6-fxx8-xjmx	Vendor Advisory
https://www.vulncheck.com/advisories/openclaw-webhook-replay-detection-bypass-via-base64-signature-re-encoding	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*

History

28 Apr 2026, 18:56

Type	Values Removed	Values Added
First Time		Openclaw openclaw Openclaw
CPE		cpe:2.3:a:openclaw:openclaw::::::node.js::*
References	~~() https://github.com/openclaw/openclaw/commit/ad77666054651c1fd77b1dc60fd6a8db6600a29a -~~	() https://github.com/openclaw/openclaw/commit/ad77666054651c1fd77b1dc60fd6a8db6600a29a - Patch
References	~~() https://github.com/openclaw/openclaw/security/advisories/GHSA-37v6-fxx8-xjmx -~~	() https://github.com/openclaw/openclaw/security/advisories/GHSA-37v6-fxx8-xjmx - Vendor Advisory
References	~~() https://www.vulncheck.com/advisories/openclaw-webhook-replay-detection-bypass-via-base64-signature-re-encoding -~~	() https://www.vulncheck.com/advisories/openclaw-webhook-replay-detection-bypass-via-base64-signature-re-encoding - Third Party Advisory

23 Apr 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-23 22:16

Updated : 2026-04-28 18:56

NVD link : CVE-2026-41351

Mitre link : CVE-2026-41351

CVE.ORG link : CVE-2026-41351

JSON object : View

Products Affected

openclaw

openclaw

CWE

CWE-294

Authentication Bypass by Capture-replay

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