CVE-2026-35634
Received Received - Intake
Authentication Bypass in OpenClaw Canvas Gateway Enables Unauthorized Access

Publication date: 2026-04-09

Last updated on: 2026-04-16

Assigner: VulnCheck

Description
OpenClaw before 2026.3.23 contains an authentication bypass vulnerability in the Canvas gateway where authorizeCanvasRequest() unconditionally allows local-direct requests without validating bearer tokens or canvas capabilities. Attackers can send unauthenticated loopback HTTP and WebSocket requests to Canvas routes to bypass authentication and gain unauthorized access.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-04-09
Last Modified
2026-04-16
Generated
2026-06-16
AI Q&A
2026-04-10
EPSS Evaluated
2026-06-15
NVD
CVE-2026-35634
EUVD
EUVD-2026-21124
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
openclaw openclaw to 2026.3.23 (exc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-288 The product requires authentication, but the product has an alternate path or channel that does not require authentication.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability exists in OpenClaw versions before 2026.3.23 and involves an authentication bypass in the Canvas gateway. Specifically, the function authorizeCanvasRequest() allows local-direct requests without properly validating bearer tokens or canvas capabilities. This means attackers can send unauthenticated HTTP and WebSocket requests from the loopback interface to Canvas routes and bypass authentication controls.

Impact Analysis

The vulnerability allows attackers to gain unauthorized access to the Canvas routes by bypassing authentication. This could lead to unauthorized actions or access to sensitive information within the affected system, potentially compromising system integrity and confidentiality.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-35634. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart