CVE-2025-26622
High
Description
vyper is a Pythonic Smart Contract Language for the EVM. Vyper `sqrt()` builtin uses the babylonian method to calculate square roots of decimals. Unfortunately, improper handling of the oscillating final states may lead to sqrt incorrectly returning rounded up results. This issue is being addressed and a fix is expected in version 0.4.1. Users are advised to upgrade as soon as the patched release is available. There are no known workarounds for this vulnerability.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Vyper
PublishedFeb 21, 2025
First seenFeb 21, 2025
Weakness typeCWE-682CWE-682
How to fix
Update
- vyperlang vyper0.4.1 or later
- vyper0.4.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| vyperlang vyper | v < 0.4.1 | 0.4.1 |
| vyperPyPI | v < 0.4.1 | 0.4.1 |
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