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 offchain_lookup_payload["urls"]. The implementation uses these contract-supplied URLs directly (after {sender} / {data} template substitution) without any destination validation. CCIP Read is enabled by default (global_ccip_read_enabled = 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 eth_call / .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.
References
| Link | Resource |
|---|---|
| https://github.com/ethereum/web3.py/commit/b1c57bb0a124359c9902daaefab4d8af7c3c4c1e | Patch |
| https://github.com/ethereum/web3.py/security/advisories/GHSA-5hr4-253g-cpx2 | Exploit Mitigation Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
02 Jun 2026, 16:48
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:apeworx:web3.py:6.0.0:beta9:*:*:*:python:*:* cpe:2.3:a:apeworx:web3.py:6.0.0:beta7:*:*:*:python:*:* cpe:2.3:a:apeworx:web3.py:8.0.0:beta1:*:*:*:python:*:* cpe:2.3:a:apeworx:web3.py:6.0.0:beta6:*:*:*:python:*:* cpe:2.3:a:apeworx:web3.py:*:*:*:*:*:python:*:* cpe:2.3:a:apeworx:web3.py:6.0.0:beta3:*:*:*:python:*:* cpe:2.3:a:apeworx:web3.py:6.0.0:beta4:*:*:*:python:*:* cpe:2.3:a:apeworx:web3.py:6.0.0:beta10:*:*:*:python:*:* cpe:2.3:a:apeworx:web3.py:6.0.0:beta11:*:*:*:python:*:* cpe:2.3:a:apeworx:web3.py:6.0.0:beta8:*:*:*:python:*:* cpe:2.3:a:apeworx:web3.py:6.0.0:-:*:*:*:python:*:* cpe:2.3:a:apeworx:web3.py:6.0.0:beta5:*:*:*:python:*:* |
|
| First Time |
Apeworx
Apeworx web3.py |
|
| References | () https://github.com/ethereum/web3.py/commit/b1c57bb0a124359c9902daaefab4d8af7c3c4c1e - Patch | |
| References | () https://github.com/ethereum/web3.py/security/advisories/GHSA-5hr4-253g-cpx2 - Exploit, Mitigation, Vendor Advisory | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.2 |
09 Apr 2026, 18:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-09 18:17
Updated : 2026-06-02 16:48
NVD link : CVE-2026-40072
Mitre link : CVE-2026-40072
CVE.ORG link : CVE-2026-40072
JSON object : View
Products Affected
apeworx
- web3.py
CWE
CWE-918
Server-Side Request Forgery (SSRF)