CVE-2026-123562 PUBLISHED

Devalue 5.8.0 before 5.9.3 Denial of Service via stringifyAsync Unhandled Rejection

Assigner: VulnCheck
Reserved: 06.11.2026 Published: 08.11.2026 Updated: 08.11.2026

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.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS Score: 8.7

Product Status

Vendor sveltejs
Product devalue
Versions Default: unaffected
  • affected from 5.8.0 to 5.9.3 (excl.)
  • Version 5.9.3 is unaffected

Credits

  • elliott-with-the-longest-name-on-github remediation developer

References

Problem Types

  • Uncaught Exception CWE