ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2025-47285

Vyper is the Pythonic Programming Language for the Ethereum Virtual Machine.

Published May 15, 2025 · catalog updated May 15, 2025 · Vyper is the Pythonic

Check this week

CVE-2025-47285 is not in CISA KEV. FIRST estimates a 46.00% chance of exploitation in the next 30 days. Check whether you run Vyper is the Pythonic.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Vyper is the Pythonic).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low2.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
46.00%
Remediation
Advisory link
Affected products
vendor vyperlang vyper ≤ 0.4.2rc1

Vyper is the Pythonic Programming Language for the Ethereum Virtual Machine. In versions up to and including 0.4.2rc1, may skip evaluation of side effects when the length of an argument is zero. This is due to a fastpath in the implementation which skips evaluation of argument expressions when their length is zero. In practice, it would be very unusual in user code to construct zero-length bytestrings using an expression with side-effects, since zero-length bytestrings are typically constructed with the empty literal ; the only way to construct an empty bytestring which has side effects would

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor vyperlang vyper ≤ 0.4.2rc1≤ 0.4.2rc1

How to fix CVE-2025-47285

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-47285 is not in CISA KEV. FIRST estimates a 46.00% chance of exploitation in the next 30 days. Check whether you run Vyper is the Pythonic.

Which versions are affected?

Compare what you have installed with vyperlang vyper ≤ 0.4.2rc1 ≤ 0.4.2rc1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 46.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 15, 2025 · EUVD

    Detected

    Vyper is the Pythonic Programming Language for the Ethereum Virtual Machine. In versions up to and including 0.4.2rc1, may skip evaluation of side effects when the length of an argument is zero. This is due to a fastpath in the implementation which skips evaluation of argument expressions when their length is zero. In practice, it would be very unusual in user code to construct zero-length bytestr

  2. May 15, 2025 · EUVD

    Updated

    Vyper is the Pythonic Programming Language for the Ethereum Virtual Machine. In versions up to and including 0.4.2rc1, may skip evaluation of side effects when the length of an argument is zero. This is due to a fastpath in the implementation which skips evaluation of argument expressions when their length is zero. In practice, it would be very unusual in user code to construct zero-length bytestr

Sources

  • CVE.orgVulnerability recordCVE-2025-47285

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2025-15445

    Vyper is the Pythonic Programming Language for the Ethereum Virtual Machine. In versions up to and including 0.4.2rc1, may skip evaluation of side effects when the length of an argument is zero. This is due to a fastpath in the implementation which skips evaluation of argument ex

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog May 15, 2025. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.