CVE-2020-9301: Linuxfoundation Spinnaker

High severity, CVSS 8.8. EPSS: 1.5% chance of exploitation in the next 30 days.

Nolan Ray from Apple Information Security identified a security vulnerability in Spinnaker, all versions prior to version 1.23.4, 1.22.4 or 1.21.5. The vulnerability exists within the handling of SpEL expressions that allows an attacker to read and write arbitrary files within the orca container via authenticated HTTP POST requests.

Affected products

• Linuxfoundation Spinnaker: before 1.21.5 (fixed in 1.21.5); from 1.22.0, before 1.22.4 (fixed in 1.22.4); from 1.23.0, before 1.23.4 (fixed in 1.23.4)

Published 2020-12-11. Last modified 2026-06-17.