{"id":"CVE-2026-111171","revision":"c1ecce434a4c48218bbbeacbb754a74e","records":[{"revision":"c1ecce434a4c48218bbbeacbb754a74e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-111171","aliases":[],"title":"Web3.py 7.15.0 through 7.16.0 and 8.0.0b2 through 8.0.0 CCIP-Read SSRF Bypass","description":"Web3.py 7.15.0 through 7.16.0 and 8.0.0b2 through 8.0.0 contains a server-side request forgery vulnerability because _check_ip_blocked() does not unwrap IPv4-mapped IPv6 addresses in CCIP Read URL validation. Malicious contracts can return OffchainLookup URLs with IPv4-mapped IPv6 hosts or AAAA records, making clients with CCIP Read enabled send requests to loopback, private, or link-local services.","state":0,"publishedAt":"2026-10-15T18:57:55.904+00:00","modifiedAt":"2026-10-15T19:29:53.958+00:00","affected":[{"ecosystem":"https://pypi.org","name":"web3.py","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"ethereum\",\n                    \"product\": \"web3.py\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"7.15.0\",\n                            \"lessThanOrEqual\": \"7.16.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"8.0.0b2\",\n                            \"lessThanOrEqual\": \"8.0.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:pypi/web3\",\n                    \"collectionURL\": \"https://pypi.org\",\n                    \"repo\": \"https://github.com/ethereum/web3.py\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","score":6.3,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N","score":5.4,"severity":"MEDIUM"}],"references":["https://github.com/ethereum/web3.py/pull/3875","https://github.com/ethereum/web3.py/blob/c8c1ed0c9e77e1a8b74902e6a6825e0b00534b10/web3/utils/ccip_url_validation.py#L16-L57","https://github.com/ethereum/web3.py/security/advisories/GHSA-5hr4-253g-cpx2","https://github.com/ethereum/web3.py","https://www.vulncheck.com/advisories/web3-py-7.15.0-through-7.16.0-and-8.0-0b2-through-8.0.0-ccip-read-ssrf-bypass"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111171","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-111171","identifiers":["CVE-2026-111171"]},"retained":false,"historicalAffected":[]}],"coverage":[]}