How to Fix CVE-2026-22021: Oracle Java SE (Bundle Sibling)
By Sai Kiran Pandrala
Last verified: 2026-05-25
CVE-2026-22021 is a sibling vulnerability in the same vendor advisory as CVE-2026-22003. Applying the patched build named in the primary write-up closes this CVE as well.
| Severity | CVSS 5.3 - Medium |
|---|---|
| Actively exploited? | Not currently in CISA KEV |
| Affected | Same as the bundle - see CVE-2026-22003 |
| Fixed in | Same patched build as CVE-2026-22003 (See vendor advisory) |
| Type (CWE) | Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. |
What's different about CVE-2026-22021?
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: JSSE). Supported versions that are affected are Oracle Java SE: 8u481, 8u481-b50, 8u481-perf, 11.0.30, 17.0.18, 21.0.10, 25.0.2, 26; Oracle GraalVM for JDK: 17.0.18 and 21.0.10; Oracle GraalVM Enterprise Edition: 21.3.17. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition.
The technical impact and remediation are identical to the primary CVE in the bundle. The same vendor patch closes both.
How to fix CVE-2026-22021
Apply the patched build per the primary write-up: How to Fix CVE-2026-22003.
The patch installation procedure, verification commands, and interim mitigations are documented there. Reusing one runbook keeps the rollout consistent across the bundle.
Frequently asked questions
Is CVE-2026-22021 fixed by the same patch as CVE-2026-22003?
Yes. CVE-2026-22021 ships in the same vendor advisory as CVE-2026-22003. Applying the patched build named in the primary write-up closes both.
What is the CVSS score for CVE-2026-22021?
The CVSS base score is 5.3 (Medium).
Is it being exploited?
It is not currently listed in CISA KEV.
References
- Official vendor advisory: https://www.oracle.com/security-alerts/cpuapr2026.html
- NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2026-22021
- CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- Primary write-up: How to Fix CVE-2026-22003
*Part of the Oracle Java SE bundle. Full procedure at CVE-2026-22003.*