CVE-2018-18854: Lightbend Spray-JSON

High severity, CVSS 7.5. EPSS: 1.9% chance of exploitation in the next 30 days.

Lightbend Spray spray-json through 1.3.4 allows remote attackers to cause a denial of service (resource consumption) because of Algorithmic Complexity during the parsing of many JSON object fields (with keys that have the same hash code).

Affected products

• Lightbend Spray-JSON: up to and including 1.3.4

Published 2018-10-31. Last modified 2026-06-17.