CVE-2026-34043

Serialize JavaScript has CPU Exhaustion Denial of Service via crafted array-like objects

State: Published
Severity: 5.9 Medium
Published: Mar 31, 2026
Updated: Mar 31, 2026
Reserved: Mar 25, 2026

Description

Serialize JavaScript to a superset of JSON that includes regular expressions and functions. Prior to version 7.0.5, there is a Denial of Service (DoS) vulnerability caused by CPU exhaustion. When serializing a specially crafted "array-like" object (an object that inherits from Array.prototype but has a very large length property), the process enters an intensive loop that consumes 100% CPU and hangs indefinitely. This issue has been patched in version 7.0.5.

Scores

CVSS	Score	Vector	Source
3.1	5.9 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-400 Uncontrolled Resource Consumption
CWE-834 Excessive Iteration

Affected Products

Product	Versions
serialize-javascriptyahoo	< 7.0.5Affected

References

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