How severe is CVE-2025-26622?

CVE-2025-26622 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2025-26622 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-26622?

CVE-2025-26622 affects Vyperlang Vyper. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-26622?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-26622 have an EU (EUVD) identifier?

Yes. CVE-2025-26622 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-4284.

When was CVE-2025-26622 published?

CVE-2025-26622 was published on 2025-02-21 and last updated on 2026-06-17.

CVE-2025-26622

CVE-2025-26622 is a high-severity vulnerability in Vyperlang Vyper with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-682.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 2.3
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-4284
Weakness: CWE-682
Affected product: Vyperlang Vyper
Published: 2025-02-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-26622?: 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.
How severe is CVE-2025-26622?: CVE-2025-26622 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2025-26622 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-26622?: CVE-2025-26622 affects Vyperlang Vyper. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-26622?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-26622 have an EU (EUVD) identifier?: Yes. CVE-2025-26622 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-4284.
When was CVE-2025-26622 published?: CVE-2025-26622 was published on 2025-02-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:vyperlang:vyper:*:*:*:*:*:python:*:*

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