CVE-2026-35656CWE-290

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

Medium · published April 10, 2026

CVSS v4.0
6.3
EPSS
1%
Percentile
45.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.3 · MEDIUM
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
EPSS
0.00551 · 45.3th percentile
Weakness
CWE-290 · Authentication Bypass by Spoofing
Published
2026-04-10T16:03Z
EPSS history
Timeline
  • 10 APR 16:03Z
    OpenClaw < 2026.3.22 - XFF Loopback Spoofing Bypass in Canvas Authentication and Rate Limiter
    cvelistv5