CVE-2026-111171
5.4 MEDIUMpublic exploit availablePublished 2026-10-15 · Updated 2026-10-16
AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.
NVD 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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Weaknesses
CWE-918
Public exploit & PoC references
- https://github.com/ethereum/web3.py
- https://github.com/ethereum/web3.py/blob/c8c1ed0c9e77e1a8b74902e6a6825e0b00534b10/web3/utils/ccip_url_validation.py#L16-L57
- https://github.com/ethereum/web3.py/pull/3875
- https://github.com/ethereum/web3.py/security/advisories/GHSA-5hr4-253g-cpx2
- https://github.com/ApeWorX/web3.py/security/advisories/GHSA-5hr4-253g-cpx2
All references
- https://github.com/ethereum/web3.py
- https://github.com/ethereum/web3.py/blob/c8c1ed0c9e77e1a8b74902e6a6825e0b00534b10/web3/utils/ccip_url_validation.py#L16-L57
- https://github.com/ethereum/web3.py/pull/3875
- https://github.com/ethereum/web3.py/security/advisories/GHSA-5hr4-253g-cpx2
- 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
- https://github.com/ApeWorX/web3.py/security/advisories/GHSA-5hr4-253g-cpx2
Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.
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