Vulnerability in Openclaw
CVE-2026-35656
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 · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.006 (43.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.006 · change: +0.002
Affected products
- Openclaw — versions 0, 2026.3.22
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-844j-xrrq-wgh4 (vendor-advisory, Vendor Advisory, third-party-advisory)
- github.com/openclaw/openclaw/commit/630f1479c44f78484dfa21bb407cbe6f171dac87 (Patch, patch)
- github.com/openclaw/openclaw/commit/fc2d29ea926f47c428c556e92ec981441228d2a4 (Patch, patch)
- www.vulncheck.com/advisories/openclaw-xff-loopback-spoofing-bypass-in-canvas-au… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-35656?
- CVE-2026-35656 is a medium-severity vulnerability in Openclaw, classified under Authentication Bypass by Spoofing. CVSS score: 6.5/10. Published 2026-04-10.
- How severe is CVE-2026-35656?
- Medium severity. CVSS v3 base score is 6.5 out of 10.