CVE-2026-35656

MEDIUM

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

Title source: cna
STIX 2.1

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.

References (4)

Core 4
Core References
Third Party Advisory third-party-advisory
VulnCheck Advisory: OpenClaw < 2026.3.22 - XFF Loopback Spoofing Bypass in Canvas Authentication and Rate Limiter
https://www.vulncheck.com/advisories/openclaw-xff-loopback-spoofing-bypass-in-canvas-authentication-and-rate-limiter
Third Party Advisory third-party-advisory
GitHub Security Advisory (GHSA-844j-xrrq-wgh4)
https://github.com/openclaw/openclaw/security/advisories/GHSA-844j-xrrq-wgh4

Scores

CVSS v3 6.5
EPSS 0.0031
EPSS Percentile 22.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-290
Status published
Products (4)
npm/openclaw 0 - 2026.3.22npm
OpenClaw/OpenClaw < 2026.3.22
openclaw/openclaw < 2026.3.22
OpenClaw/OpenClaw 2026.3.22
Published Apr 10, 2026
Tracked Since Apr 10, 2026