CVE-2026-35656

| EUVD-2026-21458 MEDIUM
2026-04-10 VulnCheck
6.3
CVSS 4.0
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CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

4
EUVD ID Assigned
Apr 10, 2026 - 16:30 euvd
EUVD-2026-21458
Analysis Generated
Apr 10, 2026 - 16:30 vuln.today
Patch Released
Apr 10, 2026 - 16:30 nvd
Patch available
CVE Published
Apr 10, 2026 - 16:03 nvd
MEDIUM 6.3

Tags

Authentication Bypass

Description

OpenClaw before 2026.3.22 contains an authentication bypass vulnerability in the X-Forwarded-For header processing when trustedProxies is configured, allowing attackers to spoof loopback hops. Remote attackers can inject forged forwarding headers to bypass canvas authentication and rate-limiting protections by masquerading as loopback clients.

Analysis

OpenClaw before version 2026.3.22 contains an authentication bypass vulnerability in X-Forwarded-For header processing when trustedProxies is configured, allowing unauthenticated remote attackers to spoof loopback client addresses and bypass canvas authentication and rate-limiting protections. The vulnerability exploits improper validation of forwarding headers to masquerade as local loopback connections, with a CVSS score of 6.5 reflecting moderate confidentiality and integrity impact but no direct availability impact.

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Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +32
POC: 0

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CVE-2026-35656 vulnerability details – vuln.today
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