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High severity7.5GHSA Advisory· Published Jun 9, 2026· Updated Aug 24, 2026

CVE-2026-42570

CVE-2026-42570

Description

Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. From version 5.6.3 to before version 5.8.1, devalue.parse could, due to quirks in some JavaScript engines, be convinced to allocate much more memory than was needed when deserializing sparse arrays, leading to excessive memory consumption. This issue has been patched in version 5.8.1.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
devaluenpm
>= 5.6.3, < 5.8.15.8.1

Affected products

3
  • Sveltejs/Devalue2 versions
    cpe:2.3:a:svelte:devalue:*:*:*:*:*:node.js:*:*+ 1 more
    • cpe:2.3:a:svelte:devalue:*:*:*:*:*:node.js:*:*range: >=5.6.3,<5.8.1
    • (no CPE)range: >= 5.6.3, <= 5.8.0
  • ghsa-coords
    pkg:npm/devalue
    Range: >= 5.6.3, < 5.8.1

Patches

Vulnerability mechanics

References

10

News mentions

0

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