# CVE-2026-34043

## Summary

- **CVE ID:** CVE-2026-34043
- **Severity:** MEDIUM
- **CVSS Score:** 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-400, CWE-834
- **Published:** Mar 31, 2026
- **Last Modified:** Mar 31, 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.

## Affected Products

- yahoo — serialize-javascript (< 7.0.5)

## References

- [CNA](https://github.com/yahoo/serialize-javascript/security/advisories/GHSA-qj8w-gfj5-8c6v)
- [CNA](https://github.com/yahoo/serialize-javascript/commit/f147e90269b58bb6e539cfdf3d0e20d6ad14204b)
- [CNA](https://github.com/yahoo/serialize-javascript/releases/tag/v7.0.5)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.47%
- **EPSS Percentile:** 39.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._