Description
Vyper from 0.2.13 before 0.2.15 allocates storage slots for @nonreentrant reentrancy locks at the same locations as contract storage variables. When a function using @nonreentrant is called, setting the lock overwrites the overlapping storage variable, corrupting contract state and breaking the contract's intended logic.
Published: 2026-10-21
Score: 8.3 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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History

Wed, 21 Oct 2026 00:45:00 +0000

Type Values Removed Values Added
Description Vyper from 0.2.13 before 0.2.15 allocates storage slots for @nonreentrant reentrancy locks at the same locations as contract storage variables. When a function using @nonreentrant is called, setting the lock overwrites the overlapping storage variable, corrupting contract state and breaking the contract's intended logic.
Title Vyper 0.2.13 before 0.2.15 Storage Corruption via @nonreentrant Decorator
First Time appeared Vyperlang
Vyperlang vyper
Weaknesses CWE-787
CPEs cpe:2.3:a:vyperlang:vyper:*:*:*:*:*:*:*:*
Vendors & Products Vyperlang
Vyperlang vyper
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H'}

cvssV4_0

{'score': 8.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

Vyperlang Vyper
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-21T00:36:18.265Z

Reserved: 2026-10-20T21:51:20.819Z

Link: CVE-2021-48018

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-21T01:17:18.983

Modified: 2026-10-21T01:17:18.983

Link: CVE-2021-48018

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-21T12:15:18Z

Weaknesses