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High severity7.5NVD Advisory· Published Mar 11, 2026· Updated Jun 17, 2026

CVE-2026-30226

CVE-2026-30226

Description

Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. In devalue v5.6.3 and earlier, devalue.parse and devalue.unflatten were susceptible to prototype pollution via maliciously crafted payloads. Successful exploitation could lead to Denial of Service (DoS) or type confusion. This vulnerability is fixed in 5.6.4.

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
< 5.6.45.6.4

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: <5.6.4
    • (no CPE)range: < 5.6.4
  • ghsa-coords
    pkg:npm/devalue
    Range: < 5.6.4

Patches

Vulnerability mechanics

References

3

News mentions

0

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