How severe is CVE-2026-22021?

CVE-2026-22021 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-22021 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-22021?

CVE-2026-22021 primarily affects Oracle Jre. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-22021?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-22021 have an EU (EUVD) identifier?

Yes. CVE-2026-22021 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24335.

When was CVE-2026-22021 published?

CVE-2026-22021 was published on 2026-04-21 and last updated on 2026-06-17.

CVE-2026-22021

CVE-2026-22021 is a medium-severity vulnerability in Oracle Jre with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-24335
Weakness: CWE-400
Affected product: Oracle Jre
Published: 2026-04-21
Last modified: 2026-06-17

Description

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. 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. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Frequently asked questions

What is 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. 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. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).
How severe is CVE-2026-22021?: CVE-2026-22021 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-22021 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-22021?: CVE-2026-22021 primarily affects Oracle Jre. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-22021?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-22021 have an EU (EUVD) identifier?: Yes. CVE-2026-22021 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24335.
When was CVE-2026-22021 published?: CVE-2026-22021 was published on 2026-04-21 and last updated on 2026-06-17.

References

https://www.oracle.com/security-alerts/cpuapr2026.html

Affected products (19)

cpe:2.3:a:oracle:jre:1.8.0:update481:*:*:-:*:*:*
cpe:2.3:a:oracle:jre:1.8.0:update481:*:*:enterprise_performance_pack:*:*:*
cpe:2.3:a:oracle:jre:1.8.0:update481_b50:*:*:-:*:*:*
cpe:2.3:a:oracle:jre:11.0.30:*:*:*:*:*:*:*
cpe:2.3:a:oracle:jre:17.0.18:*:*:*:*:*:*:*
cpe:2.3:a:oracle:jre:21.0.10:*:*:*:*:*:*:*
cpe:2.3:a:oracle:jre:25.0.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:jre:26:*:*:*:*:*:*:*
cpe:2.3:a:oracle:jdk:1.8.0:update481:*:*:-:*:*:*
cpe:2.3:a:oracle:jdk:1.8.0:update481:*:*:enterprise_performance_pack:*:*:*
cpe:2.3:a:oracle:jdk:1.8.0:update481_b50:*:*:-:*:*:*
cpe:2.3:a:oracle:jdk:11.0.30:*:*:*:*:*:*:*
cpe:2.3:a:oracle:jdk:17.0.18:*:*:*:*:*:*:*
cpe:2.3:a:oracle:jdk:21.0.10:*:*:*:*:*:*:*
cpe:2.3:a:oracle:jdk:25.0.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:jdk:26:*:*:*:*:*:*:*
cpe:2.3:a:oracle:graalvm:21.3.17:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:graalvm_for_jdk:17.0.18:*:*:*:*:*:*:*
cpe:2.3:a:oracle:graalvm_for_jdk:21.0.10:*:*:*:*:*:*:*

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