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Advisory record · GHSA-22wc-c9wj-6q2v

VVE-2021-0001: Memory corruption using function calls within arrays

CVSS 8.3 HighEPSS 0.0028 · 21st percentile

Published by the GitHub Advisory Database at 19 Apr 2021, 15:12 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
vyperPyPI<0.2.120.2.12
Identifiers
GHSA-22wc-c9wj-6q2v · CVE-2021-48020
Weakness (CWE)
CWE-129 · CWE-787
Tags
Published
19 Apr 2021
Updated
24 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Vyper versions before 0.2.12 are affected by a memory corruption issue when a function call is made inside an array. The source does not describe what an attacker must do to trigger it or the full impact beyond memory corruption. Upgrade vyper to version 0.2.12 or later.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.3 High 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0028, the 21st percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:07 UTC First seen by agentprime
  2. 31 Oct 2026, 14:07 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.