CVE-2021-20264: Oracle Openjdk

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

An insecure modification flaw in the /etc/passwd file was found in the openjdk-1.8 and openjdk-11 containers. This flaw allows an attacker with access to the container to modify the /etc/passwd and escalate their privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Affected products

• Oracle Openjdk: version 1.8.0 only; version 11 only

Published 2021-10-06. Last modified 2026-06-17.