CVE-2026-40072

HIGHNVD 7.27.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.2 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 81% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
7.2
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.2Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
7.2
EG Score
7.2(medium)
EPSS
13.6%
KEV
Not listed

Published

April 9, 2026

Last Modified

June 2, 2026

Advisory Details (2)

Auto-updated Jun 15, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

SSRF via CCIP Read (EIP-3668) OffchainLookup URL handling · Advisory · ApeWorX/web3.py · GitHub

https://github.com/ethereum/web3.py/security/advisories/GHSA-5hr4-253g-cpx2
github_commit

commit b1c57bb0a124 (ethereum/web3.py)

Fix landed in ethereum/web3.py commit b1c57bb0a124 — awaiting tagged release

https://github.com/ethereum/web3.py/commit/b1c57bb0a124359c9902daaefab4d8af7c3c4c1e

Vendor Advisories for CVE-2026-40072(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
web38.0.0b18.0.0b2—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 37× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-16 17:03 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
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  1. 2026-06-25 13:49 UTCEPSS rescore
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  6. 2026-06-21 14:56 UTCEPSS rescore
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  8. 2026-06-21 01:59 UTCEPSS rescore
  9. 2026-06-19 19:25 UTCEPSS rescore
  10. 2026-06-18 17:52 UTCEPSS rescore
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  22. 2026-06-08 14:17 UTCEPSS rescore
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  24. 2026-06-07 15:25 UTCEPSS rescore
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  27. 2026-06-07 08:35 UTCEG score recompute▲ 7.20
  28. 2026-06-06 13:47 UTCEPSS rescore
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  30. 2026-06-05 22:47 UTCEPSS rescore
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  36. 2026-06-02 20:13 UTCEPSS rescore
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  40. 2026-05-31 22:30 UTCEPSS rescore
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  50. 2026-05-27 13:40 UTCEPSS rescore
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  55. 2026-05-20 22:38 UTCEPSS rescore
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  57. 2026-05-20 18:05 UTCEG score recompute
  58. 2026-05-20 11:22 UTCEPSS rescore
  59. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-40072?
CVE-2026-40072 is a high vulnerability published on April 9, 2026. 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…
When was CVE-2026-40072 disclosed?
CVE-2026-40072 was first published in the National Vulnerability Database on April 9, 2026, with the most recent update on June 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40072 actively exploited?
CVE-2026-40072 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 13.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-40072?
CVE-2026-40072 has a CVSS v3 base score of 7.2 (NVD).
How do I remediate CVE-2026-40072?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40072, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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