High severity · published Sep 27, 2023
CVE-2023-42460
Vyper is a Pythonic Smart Contract Language for the EVM
7.5
CVSS
0.7%
EPSS
No
On KEV
Description
Vyper is a Pythonic Smart Contract Language for the EVM. The `_abi_decode()` function does not validate input when it is nested in an expression. Uses of `_abi_decode()` can be constructed which allow for bounds checking to be bypassed resulting in incorrect results. This issue has not yet been fixed, but a fix is expected in release `0.3.10`. Users are advised to reference pull request #3626.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VY
Vyper · Vyperlang
0.3.4 before 0.3.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-42460
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-42460
Patch
https://github.com/vyperlang/vyper/pull/3626
Exploit
https://github.com/vyperlang/vyper/security/advisories/GHSA-cx2q-hfxr-rj97
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