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.

Score

CVSS 3.1 7.5 High

Status

Analyzed - security-advisories@github.com

Published

2026-03-31

Last modified

2026-03-31

Weaknesses

CWE-400, CWE-834

Affected products

• Serialize (Yahoo)
• Serialize-javascript (Yahoo)

References

• https://github.com/yahoo/serialize-javascript/commit/f147e90269b58bb6e539cfdf3d0e20d6ad14204b
• https://github.com/yahoo/serialize-javascript/releases/tag/v7.0.5
• https://github.com/yahoo/serialize-javascript/security/advisories/GHSA-qj8w-gfj5-8c6v