GitHub Advisoryadvisory · npm

GHSA-mcm9-63f2-9j32 devalue: Repeated primitive strings cause quadratic expansion in uneval

HIGH Published 2026-10-01 Modified 2026-10-01 Official page ↗
Ecosystem
npm
Packages
devalue
Severity
High
CVSS vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weaknesses
CWE-400, CWE-409
Reviewed
2026-10-01

Affected packages

• npm devalue: < 5.9.3 → fixed in 5.9.3

Description

Under very constrained circumstances, data that was `parse`d and then passed to `uneval` could turn a small payload into a very large serialized string.

Related

Weakness · CWE (2)

  • CWE-400 Uncontrolled Resource Consumption weakness
  • CWE-409 Improper Handling of Highly Compressed Data (Data Amplification) weakness

References