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.
Published: 2026-04-10
Score: 6.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Authentication Bypass with rate‑limiter evasion
Action: Immediate Patch
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-844j-xrrq-wgh4 OpenClaw: Forwarding header spoofing bypasses gateway.trustedProxies origin detection
History

Fri, 10 Apr 2026 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 10 Apr 2026 16:30:00 +0000

Type Values Removed Values Added
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.
Title OpenClaw < 2026.3.22 - XFF Loopback Spoofing Bypass in Canvas Authentication and Rate Limiter
First Time appeared Openclaw
Openclaw openclaw
Weaknesses CWE-290
CPEs cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
Vendors & Products Openclaw
Openclaw openclaw
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

cvssV4_0

{'score': 6.3, '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'}


Subscriptions

Openclaw Openclaw
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-04-10T18:23:28.866Z

Reserved: 2026-04-04T12:31:23.534Z

Link: CVE-2026-35656

cve-icon Vulnrichment

Updated: 2026-04-10T18:23:24.889Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-10T17:17:06.733

Modified: 2026-04-13T21:07:56.597

Link: CVE-2026-35656

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-13T13:00:48Z

Weaknesses