MEDIUM
CVE-2023-42441
CWE-833Published: September 18, 2023· Updated: Jun 17, 2026
5.3
CVSS v3.1
Official Description
Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine (EVM). Starting in version 0.2.9 and prior to version 0.3.10, locks of the type `@nonreentrant("")` or `@nonreentrant('')` do not produce reentrancy checks at runtime. This issue is fixed in version 0.3.10. As a workaround, ensure the lock name is a non-empty string.
Technical Analysis
CVE-2023-42441 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.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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
All References (6)
→
https://github.com/vyperlang/vyper/pull/3605Issue Tracking · Patch
→
https://github.com/vyperlang/vyper/security/advisories/GHSA-3hg2-r75x-g69mExploit · Patch · Vendor Advisory
→
https://github.com/vyperlang/vyper/pull/3605Issue Tracking · Patch
→
https://github.com/vyperlang/vyper/security/advisories/GHSA-3hg2-r75x-g69mExploit · Patch · Vendor Advisory
Quick Facts
CVE IDCVE-2023-42441
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-833
CISA KEVNo
Affected1 vendor(s)
PublishedSep 18, 2023
Related CVEs (CWE-833)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-42441 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.