OpenClaw versions prior to 2026.2.21 improperly parse the left-most X-Forwarded-For header value when requests originate from configured trusted proxies, allowing attackers to spoof client IP addresses. In proxy chains that append or preserve header values, attackers can inject malicious header content to influence security decisions including authentication rate-limiting and IP-based access controls.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Openclaw Openclaw
cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
|
— |
2026.2.21
|
References 4
https://github.com/openclaw/openclaw/commit/07039dc089e51589a213ec0d16f8d6f2cd8…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/commit/8877bfd11ec7760b115b2d0d7500a45da27…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/security/advisories/GHSA-2rgf-hm63-5qph
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/openclaw-client-ip-spoofing-via-x-forwarde…
disclosure@vulncheck.com