CVE-2026-32141

HIGH 7.5

flatted: Unbounded recursion DoS in parse() revive phase

CVSS Score

7.5

EPSS Score

0.8%

EPSS Percentile

52th

flatted is a circular JSON parser. Prior to 3.4.0, flatted's parse() function uses a recursive revive() phase to resolve circular references in deserialized JSON. When given a crafted payload with deeply nested or self-referential $ indices, the recursion depth is unbounded, causing a stack overflow that crashes the Node.js process. This vulnerability is fixed in 3.4.0.

CWE	CWE-674
Vendor	webreflection
Product	flatted
Published	Mar 12, 2026
Last Updated	Jul 17, 2026

Stay Ahead of the Next One

Get instant alerts for webreflection flatted

Be the first to know when new high vulnerabilities affecting webreflection flatted are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

WebReflection / flatted

< 3.4.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗