HOMEVULNERABILITIESCVE-2023-42460
HIGH

CVE-2023-42460

CWE-682Published: September 27, 2023· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2023-42460 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

vyperlang1 product(s)
vyper
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/vyperlang/vyper/pull/3626
PATCHhttps://github.com/vyperlang/vyper/security/advisories/GHSA-cx2q-hfxr-rj97
PATCHhttps://github.com/vyperlang/vyper/pull/3626
PATCHhttps://github.com/vyperlang/vyper/security/advisories/GHSA-cx2q-hfxr-rj97

All References (4)

→
https://github.com/vyperlang/vyper/pull/3626Patch
→
https://github.com/vyperlang/vyper/security/advisories/GHSA-cx2q-hfxr-rj97Exploit · Patch · Third Party Advisory
→
https://github.com/vyperlang/vyper/pull/3626Patch
→
https://github.com/vyperlang/vyper/security/advisories/GHSA-cx2q-hfxr-rj97Exploit · Patch · Third Party Advisory

Quick Facts

CVE IDCVE-2023-42460
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-682
CISA KEVNo
Affected1 vendor(s)
PublishedSep 27, 2023

Related CVEs (CWE-682)

CVE-2021-44847
9.8
CVE-2026-1229
9.8
CVE-2020-0221
9.8
CVE-2024-36736
9.8
CVE-2018-8319
9.8
CVE-2022-30600
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-42460 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2023-42460·NVD