medium5.9
CVE-2026-34043
Serialize JavaScript to a superset of JSON that includes regular expressions and functions.
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | serialize-javascript | >= 5.0.0, < 7.0.5 | 7.0.5 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Yahoo | Serialize | before 7.0.5 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-qj8w-gfj5-8c6v
- https://github.com/yahoo/serialize-javascript/security/advisories/GHSA-qj8w-gfj5-8c6v
- https://github.com/yahoo/serialize-javascript/commit/f147e90269b58bb6e539cfdf3d0e20d6ad14204b
- https://github.com/yahoo/serialize-javascript/releases/tag/v7.0.5
- https://nvd.nist.gov/vuln/detail/CVE-2026-34043
- https://github.com/yahoo/serialize-javascript/releases/tag/v5.0.0