CVE-2026-111171
mediumWeb3.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-m…
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:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/ethereum/web3.py disclosure@vulncheck.com
- https://github.com/ethereum/web3.py/blob/c8c1ed0c9e77e1a8b74902e6a6825e0b00534b10/web3/uti... disclosure@vulncheck.com
- https://github.com/ethereum/web3.py/pull/3875 disclosure@vulncheck.com
- https://github.com/ethereum/web3.py/security/advisories/GHSA-5hr4-253g-cpx2 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/web3-py-7.15.0-through-7.16.0-and-8.0-0b2-through-8.0... disclosure@vulncheck.com
- https://github.com/ApeWorX/web3.py/security/advisories/GHSA-5hr4-253g-cpx2 134c704f-9b21-4f2e-91b3-4a467353bcc0