Oracle Java (JDK) vulnerabilities: known CVEs & security history
Oracle · Web / Runtime · 7 tracked CVEs · 0 actively exploited · updated July 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Oracle Java (JDK) release lines — 7 in total. A CVE here doesn't mean your version is affected — check Oracle Java (JDK)'s current status and the safe version to run.
Known Oracle Java (JDK) CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2016-9841 | critical | 9.8 | 8% | 2017 |
| CVE-2016-9842 | high | 8.8 | 5% | 2017 |
| CVE-2016-9840 | high | 8.8 | 5% | 2017 |
| CVE-2026-34282 | high | 7.5 | 1% | 2026 |
| CVE-2026-22016 | high | 7.5 | 1% | 2026 |
| CVE-2026-21945 | high | 7.5 | 1% | 2026 |
| CVE-2026-21932 | high | 7.4 | 0% | 2026 |
Is my Oracle Java (JDK) version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your Oracle Java (JDK) version → · Monitor Oracle Java (JDK) for new CVEs →
Oracle Java (JDK) vulnerabilities — frequently asked
How many known vulnerabilities does Oracle Java (JDK) have?
IsItPatched tracks 7 CVEs for Oracle Java (JDK). 1 is critical-severity and 6 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Oracle Java (JDK) have any actively-exploited vulnerabilities?
None of Oracle Java (JDK)'s tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe Oracle Java (JDK) vulnerability?
Among tracked issues, CVE-2016-9841 (CRITICAL, CVSS 9.8) ranks highest.
Is Oracle Java (JDK) safe to use?
It depends on the version. The latest supported Oracle Java (JDK) release clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: Oracle Java (JDK) security status · Oracle Java (JDK) end-of-life · actively-exploited CVEs. Always verify against Oracle's advisories — see our disclaimer.