OpenClaw versions prior to 2026.2.22 contain incomplete IPv4 special-use range validation in the isPrivateIpv4() function, allowing requests to RFC-reserved ranges to bypass SSRF policy checks. Attackers with network reachability to special-use IPv4 ranges can exploit web_fetch functionality to access blocked addresses such as 198.18.0.0/15 and other non-global ranges.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 6
https://github.com/openclaw/openclaw/commit/333fbb86347998526dd514290adfd5f727c…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/commit/44dfbd23df453e51b71ef79a148c28c53e8…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/commit/71bd15bb4294d3d1b54386064d69cd0f5f7…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/commit/f14ebd743cfc73f667fae80af70043d0ab1…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/security/advisories/GHSA-4rqq-w8v4-7p47
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/openclaw-incomplete-ipv4-special-use-range…
disclosure@vulncheck.com