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CVE-2026-3690: OpenClaw Canvas Authentication Bypass Vulnerability

• Severity: high (CVSS 7.4 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-11 · updated 2026-06-17
• Weakness: CWE-291

Description

OpenClaw Canvas Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of OpenClaw. Authentication is not required to exploit this vulnerability. The specific flaw exists within the implementation of the the authentication function for canvas endpoints. The issue results from improper implementation of authentication. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-29311.

Affected products

• OpenClaw: before 2026.2.19 — fixed in 2026.2.19

How to fix

Upgrade to a fixed version: OpenClaw 2026.2.19. Check the vendor advisory for mitigations.

References

• https://github.com/openclaw/openclaw/security/advisories/GHSA-vvjh-f6p9-5vcf
• https://www.zerodayinitiative.com/advisories/ZDI-26-228/

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