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CVE-2025-26622

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Date: February 21, 2025

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.

Severity Score

Related Resources (6)

https://github.com/pypa/advisory-database/tree/main/vulns/vyper/PYSEC-2025-29.yaml
https://github.com/vyperlang/vyper/security/advisories/GHSA-2p94-8669-xg86
https://nvd.nist.gov/vuln/detail/CVE-2025-26622
https://github.com/vyperlang/vyper/pull/4486
https://github.com/vyperlang/vyper
https://www.mend.io/vulnerability-database/CVE-2025-26622

Severity Score

Weakness Type (CWE)

Incorrect Calculation

CWE-682

Top Fix

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Upgrade to version vyper - 0.4.1

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

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