What is CVE-2021-28167?

CVE-2021-28167 is a medium-severity vulnerability in Eclipse Openj9, classified under CWE-909. CVSS score: 6.5/10. Published 2021-04-21.

How severe is CVE-2021-28167?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Eclipse Openj9

CVE-2021-28167

In Eclipse Openj9 to version 0.25.0, usage of the jdk.internal.reflect.ConstantPool API causes the JVM in some cases to pre-resolve certain constant pool entries. This allows a user to call static methods or access static members without running the class initialization method, and may allow a user to observe uninitialized values.

Published 2021-04-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.011 (65.8th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Eclipse Openj9
The Eclipse Foundation Openj9 — versions unspecified

Weakness classification (CWE)

CWE-909

References

github.com/eclipse/openj9/issues/12016 (Exploit, Patch, Third Party Advisory)
security.netapp.com/advisory/ntap-20240621-0006/

Frequently asked questions

What is CVE-2021-28167?: CVE-2021-28167 is a medium-severity vulnerability in Eclipse Openj9, classified under CWE-909. CVSS score: 6.5/10. Published 2021-04-21.
How severe is CVE-2021-28167?: Medium severity. CVSS v3 base score is 6.5 out of 10.