Not a U.S. government website. NDD is an independent vulnerability database by Volerion and is not affiliated with or endorsed by NIST or NVD.

CVE-2026-111171 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L

CNA: [email protected]CVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://github.com/ApeWorX/web3.py/security/advisories/GHSA-5hr4-253g-cpx2	CISA-ADP	AdvisoryExploitRemedyVendor
https://github.com/ethereum/web3.py	[email protected]	Vendor
https://github.com/ethereum/web3.py/blob/c8c1ed0c9e77e1a8b74902e6a6825e0b00534b10/web3/utils/ccip_url_validation.py#L16-L57	[email protected]	Source CodeVendor
https://github.com/ethereum/web3.py/pull/3875	[email protected]	Issue TrackingVendor
https://github.com/ethereum/web3.py/security/advisories/GHSA-5hr4-253g-cpx2	[email protected]	AdvisoryExploitRemedyVendor
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	[email protected]	Advisory

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-918	Server-Side Request Forgery (SSRF)	[email protected]

Affected Products

Product	Versions
ApeWorX web3.py	>= 6.0.0b3, <= 7.16.0 >= 8.0.0b2, <= 8.0.0
CPE No CPEs found in CPE dictionary for this product. Remediation Upgrade: 7.15.0moderate effort Upgrade: 8.0.0b2moderate effort

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 15, 2026	CVE Modified	CISA-ADP
Oct 15, 2026	New CVE Received	[email protected]