CVE-2023-32675— Nonpayable default functions are sometimes payable in vyper
Quick assessment
Affected
vyperlang vyper
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Vyper是EVM 的 Pythonic 智能合约语言。 Vyper 0.3.8之前版本存在安全漏洞，该漏洞源于在具有多个常规非支付函数的合约中，即使默认函数被标记为不可支付，也可以将资金发送到默认函数。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-32675
Vulnerability Information
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Vulnerability Title
Nonpayable default functions are sometimes payable in vyper
Source: CVE Program / CVE List V5
Vulnerability Description
Vyper is a pythonic Smart Contract Language for the ethereum virtual machine. In contracts with more than one regular nonpayable function, it is possible to send funds to the default function, even if the default function is marked `nonpayable`. This applies to contracts compiled with vyper versions prior to 0.3.8. This issue was fixed by the removal of the global `calldatasize` check in commit `02339dfda`. Users are advised to upgrade to version 0.3.8. Users unable to upgrade should avoid use of nonpayable default functions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
控制流实现总是不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Vyper 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vyper是EVM 的 Pythonic 智能合约语言。 Vyper 0.3.8之前版本存在安全漏洞，该漏洞源于在具有多个常规非支付函数的合约中，即使默认函数被标记为不可支付，也可以将资金发送到默认函数。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2023-32675
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Patches & Fixes for CVE-2023-32675 (1)
Vendor Advisories for CVE-2023-32675 (1)
-
https://github.com/vyperlang/vyper/security/advisories/GHSA-vxmm-cwh2-q762 x_refsource_CONFIRM
IV. Related Vulnerabilities
Same product: vyper
-
CVE-2025-47774
Vyper's `slice()` may elide side-effects when output length -
CVE-2025-47285
Vyper's `concat()` builtin may elide side-effects for zero-l -
CVE-2025-26622
sqrt doesn't define rounding behavior in Vyper -
CVE-2025-27104
double eval in For List Iter in Vyper -
CVE-2025-27105
AugAssign evaluation order causing OOB write within the obje
Same vendor: vyperlang
-
CVE-2025-47774
Vyper's `slice()` may elide side-effects when output length -
CVE-2025-47285
Vyper's `concat()` builtin may elide side-effects for zero-l -
CVE-2025-26622
sqrt doesn't define rounding behavior in Vyper -
CVE-2025-27104
double eval in For List Iter in Vyper -
CVE-2025-27105
AugAssign evaluation order causing OOB write within the obje
Same weakness: CWE-670
-
CVE-2026-106586
OpenSSH <10.6 restricted关键字隧道转发绕过 -
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CVE-2026-72705
Rocq Prover before 9.2.0 Guard Checker Accepts Fixpoint Pass -
CVE-2026-72704
Rocq Prover through 9.2.0 Guard Checker Trusts Corrupted Rec
V. Comments for CVE-2023-32675
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