CVE-2026-32141: Webreflection Flatted

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

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.

Affected products

• Webreflection Flatted: before 3.4.0 (fixed in 3.4.0)

Published 2026-03-12. Last modified 2026-09-04.