CVE-2021-39235: Apache Ozone

Medium severity, CVSS 6.5. EPSS: 1.6% chance of exploitation in the next 30 days.

In Apache Ozone before 1.2.0, Ozone Datanode doesn't check the access mode parameter of the block token. Authenticated users with valid READ block token can do any write operation on the same block.

Affected products

• Apache Ozone: before 1.2.0 (fixed in 1.2.0)

Published 2021-11-19. Last modified 2026-06-17.