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High · 7.5 CVE-2026-123562 EUVD-2026-119447GHSA-6jpw-759r-8m52GHSA-x5rw-q4pp-hg5g

Devalue 5.8.0 before 5.9.3 Denial of Service via stringifyAsync Unhandled Rejection

Published Nov 8, 2026 · Updated Nov 9, 2026 · Assigned by VulnCheck

Description

devalue (sveltejs/devalue) 5.8.0 before 5.9.3 contains an unhandled promise rejection in stringifyAsync: when serializing multiple promises, a later promise rejecting before an earlier one settles leaves an internal rejection unhandled, even if the caller catches the returned promise. An attacker able to influence the timing or failure of serialized asynchronous values can terminate the Node.js process.

Affected products

VendorProductAffectedFixed
sveltejs devalue 5.8.0 – < 5.9.3 5.9.3

Affected packages

EcosystemPackageAffectedFixedRecord
npm devalue >= 5.8.0, < 5.9.3 5.9.3 GHSA-x5rw-q4pp-hg5g

References