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CVE-2026-30226

CVE-2026-30226 · devalue has prototype pollution in devalue.parse and devalue.unflatten

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 6.3 · Medium · EPSS 0.4% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • devalue

    Versions
    • < 5.6.4: Affected

    No fix published

  • devalue npm

    Affected ranges
    • SEMVER: < 5.6.4

    Update to 5.6.4

Original sources

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