CVE-2026-40072
- Source
- https://cve.org/CVERecord?id=CVE-2026-40072
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40072.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-40072
- Aliases
- Published
- 2026-04-09T17:41:14.920Z
- Modified
- 2026-07-08T08:13:51.176824118Z
- Severity
-
- 1.7 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U CVSS Calculator
- Summary
- web3.py affected by SSRF via CCIP Read (EIP-3668) OffchainLookup URL handling
- Details
-
web3.py allows you to interact with the Ethereum blockchain using Python. From 6.0.0b3 to before 7.15.0 and 8.0.0b2, web3.py implements CCIP Read / OffchainLookup (EIP-3668) by performing HTTP requests to URLs supplied by smart contracts in offchainlookuppayload["urls"]. The implementation uses these contract-supplied URLs directly (after {sender} / {data} template substitution) without any destination validation. CCIP Read is enabled by default (globalccipreadenabled = True on all providers), meaning any application using web3.py's .call() method is exposed without explicit opt-in. This results in Server-Side Request Forgery (SSRF) when web3.py is used in backend services, indexers, APIs, or any environment that performs ethcall / .call() against untrusted or user-supplied contract addresses. A malicious contract can force the web3.py process to issue HTTP requests to arbitrary destinations, including internal network services and cloud metadata endpoints. This vulnerability is fixed in 7.15.0 and 8.0.0b2.
- Database specific
{ "unresolved_ranges": [ { "source": "AFFECTED_FIELD", "extracted_events": [ { "introduced": "8.0.0b1" }, { "fixed": "8.0.0b2" } ] } ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40072.json", "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-918" ] }- References
Affected packages
Git / github.com/apeworx/web3.py
Affected ranges
- Type
- GIT
- Repo
- https://github.com/apeworx/web3.py
- Events
- Database specific
{ "source": [ "CPE_RANGE", "CPE_STRING", "REFERENCES" ], "cpe": [ "cpe:2.3:a:apeworx:web3.py:*:*:*:*:*:python:*:*", "cpe:2.3:a:apeworx:web3.py:6.0.0:-:*:*:*:python:*:*" ], "extracted_events": [ { "introduced": "6.1.0" }, { "fixed": "7.15.0" }, { "introduced": "6.0.0-NA" }, { "last_affected": "6.0.0-NA" } ] }