Improper Handling of Highly Compressed Data (Data Amplification) Affecting devalue package, versions <5.9.3
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Test your applications- Snyk IDSNYK-JS-DEVALUE-20416738
- published4 Oct 2026
- disclosed1 Oct 2026
- creditUnknown
Introduced: 1 Oct 2026
New CVE NOT AVAILABLE CWE-409 (opens in a new tab)How to fix?
Upgrade devalue to version 5.9.3 or higher.
Overview
devalue is a JSON.stringify, but handles cyclical references, repeated references, undefined, regular expressions, dates, Map and Set.
Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data (Data Amplification) via the uneval function when serializing a value containing many repeated long strings or bigint primitives. Each repeated primitive is re-stringified on every reference rather than being deduplicated, causing the output size to grow quadratically with the number of repetitions. An attacker who can supply input to a uneval call can trigger excessive CPU and memory consumption, crashing the process.