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CVE-2026-40072

Apeworx Web3.py server-side request forgery (SSRF)

7.2 HIGHPublic exploitEPSS 0.31%
  1. Published9 Apr 2026

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Affected products

Apeworx Web3.py6.0.0 · 8.0.0 · ≥ 6.1.0 < 7.15.0

Remediation

Fixed in
Apeworx Web3.py≥ 7.15.0

References

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Frequently asked

Is CVE-2026-40072 being actively exploited?

CVE-2026-40072 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.31%.

How severe is CVE-2026-40072?

CVE-2026-40072 has a CVSS 3.1 base score of 7.2, rated high. EPSS estimates a 0.31% probability of exploitation.

Which products are affected by CVE-2026-40072?

Affected products include Apeworx Web3.py.

How do I fix CVE-2026-40072?

Upgrade affected software to a fixed version, for example Apeworx Web3.py 7.15.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-40072 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.