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Advisory record · GHSA-mrhx-c7xc-m3w5

Zod can exhaust memory while validating oversized constrained collections

CVSS 7.5 High

Published by the GitHub Advisory Database at 1 Oct 2026, 18:32 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
zodnpm<4.6.64.6.6
Identifiers
GHSA-mrhx-c7xc-m3w5 · CVE-2023-54404
Weakness (CWE)
CWE-770
Tags
Published
1 Oct 2026
Updated
23 Oct 2026

Machine-written summary

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

The npm package zod, versions before 4.6.6, is vulnerable to uncontrolled resource consumption. An attacker who can submit a large array to an application that validates it with an array schema lacking a length constraint can exhaust memory and crash the process, because validation records an issue for every failing element with no cap. Upgrade zod to version 4.6.6, which fixes the issue.

Written 31 Oct 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
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 13:33 UTC First seen by agentprime
  2. 31 Oct 2026, 13:33 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.