CVE-2026-34043 | THREATINT

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.

PUBLISHED Reserved 2026-03-25 | Published 2026-03-31 | Updated 2026-03-31 | Assigner GitHub_M

MEDIUM: 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-400: Uncontrolled Resource Consumption

CWE-834: Excessive Iteration

Product status

< 7.0.5

affected

References

github.com/...script/security/advisories/GHSA-qj8w-gfj5-8c6v

github.com/...ommit/f147e90269b58bb6e539cfdf3d0e20d6ad14204b

github.com/yahoo/serialize-javascript/releases/tag/v7.0.5

cve.org (CVE-2026-34043)

nvd.nist.gov (CVE-2026-34043)

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