CVE-2026-34043

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.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/yahoo/serialize-javascript/commit/f147e90269b58bb6e539cfdf3d0e20d6ad14204b	Patch
https://github.com/yahoo/serialize-javascript/releases/tag/v7.0.5	Release Notes
https://github.com/yahoo/serialize-javascript/security/advisories/GHSA-qj8w-gfj5-8c6v	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:yahoo:serialize:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-31 03:15

Updated : 2026-06-17 10:38

NVD link : CVE-2026-34043

Mitre link : CVE-2026-34043

CVE.ORG link : CVE-2026-34043

JSON object : View

Products Affected

yahoo

serialize

CWE

CWE-400

Uncontrolled Resource Consumption

CWE-834

Excessive Iteration

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