GitHub Advisoryadvisory · npm
GHSA-mrhx-c7xc-m3w5 Zod can exhaust memory while validating oversized constrained collections
HIGH
Official page ↗
- Aliases
- CVE-2023-54404
- Ecosystem
- npm
- Packages
- zod
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-770
- Reviewed
- 2026-10-23
Affected packages
• npm zod: < 4.6.6 → fixed in 4.6.6
Description
Zod schema-validation library through 4.6.5 contains an uncontrolled resource consumption vulnerability that allows attackers to exhaust memory by submitting a large array to an application using an array schema without a length constraint. Attackers can exploit the handleArrayResult parse logic in $ZodArray, which accumulates every validation issue for each failing element with no cap or early termination, causing the process to allocate excessive issue objects and crash due to out-of-memory conditions.
Related
Alias · not in database (1)
Weakness · CWE (1)
- CWE-770 Allocation of Resources Without Limits or Throttling weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2023-54404 advisory
- https://github.com/colinhacks/zod/issues/1872 web
- https://github.com/colinhacks/zod/pull/6475 web
- https://github.com/colinhacks/zod/pull/6652 web
- https://github.com/colinhacks/zod/commit/a0ebf970f2d752e5f58527cd2942ff48be4f46bd web
- https://github.com/colinhacks/zod package
- https://www.vulncheck.com/advisories/zod-uncontrolled-resource-consumption-via-array-validation web