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

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Summary

CVECVE-2026-34043
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-31 03:15:58 UTC
Updated2026-04-03 16:53:52 UTC
DescriptionSerialize 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.000380000 probability, percentile 0.113480000 (date 2026-04-02)

Problem Types: CWE-400 | CWE-834 | CWE-400 CWE-400: Uncontrolled Resource Consumption | CWE-834 CWE-834: Excessive Iteration

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1[email protected]Secondary5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Yahoo Serialize All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Yahoo Serialize-javascript affected < 7.0.5 Not specified

References

ReferenceSourceLinkTags
github.com/yahoo/serialize-javascript/commit/f147e90269b58bb6e539cfdf3d0... [email protected] github.com Patch
github.com/yahoo/serialize-javascript/security/advisories/GHSA-qj8w-gfj5... [email protected] github.com Vendor Advisory
github.com/yahoo/serialize-javascript/releases/tag/v7.0.5 [email protected] github.com Release Notes
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