CVE-2026-35656

OpenClaw < 2026.3.22 - XFF Loopback Spoofing Bypass in Canvas Authentication and Rate Limiter

State: Published
Severity: 6.3 Medium
Published: Apr 10, 2026
Updated: Jun 23, 2026
Reserved: Apr 4, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.3 Medium	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	VulnCheck
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N	VulnCheck

Weaknesses

CWE-290 Authentication Bypass by Spoofing

Affected Products

Product	Versions
OpenClawOpenClaw	before 2026.3.22Affected 2026.3.22Not affected

References

GitHub Security Advisory (GHSA-844j-xrrq-wgh4)vendor-advisory
Patch Commit #1patch
Patch Commit #2patch
VulnCheck Advisory: OpenClaw < 2026.3.22 - XFF Loopback Spoofing Bypass in Canvas Authentication and Rate Limiterthird-party-advisory

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