High [CVE-2026-47063] Enhance Jar handling (Oracle CPU 2026-07)
This high-severity Red Hat Linux advisory covers CVE-2026-47063 affecting OPENJDK ELS 11.0.32, Red Hat Build of OpenJDK 17.0.20, Red Hat Build of OpenJDK 21.0.12.
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Summary
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Libraries). 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 7.5 (Integrity impacts).
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N). A flaw was found in OpenJDK.
There exists a potential existential forgery vulnerability in CMS and protocols which use CMS. In Java, CMS is used to sign JAR files.
Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N). Weakness: CWE-347.
Affected products named by the advisory: OPENJDK ELS 11.0.32; Red Hat Build of OpenJDK 17.0.20; Red Hat Build of OpenJDK 21.0.12; Red Hat Build of OpenJDK 25.0.4; and 21 more.
Affected products named by the advisory: Red Hat Build of OpenJDK 8u502; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; and 17 more.
- 11.0.31
- 17.0.19
- 21.0.11
- 25.0.3
- 26.0.1
Official advisory · high-confidence parse· fetched 18 days ago·verify at source
- java-11-openjdk-portable
- java-11-openjdk-windows
- java-17-openjdk-portable
- java-17-openjdk-windows
- java-21-openjdk-portable
- java-21-openjdk-windows
- java-25-openjdk-portable
- java-1.8.0-openjdk-portable
- java-1.8.0-openjdk-windows
- java-21-openjdk-1:21.0.12.0.8-1.2.el10_2
- java-25-openjdk-1:25.0.4.0.7-1.1.el10_2
- java-21-ibm-semeru-certified-jdk-1:21.0.12.0.8-2.el10_2
- java-21-openjdk-1:21.0.12.0.8-1.1.el10_2
- java-21-ibm-semeru-certified-jdk-1:21.0.12.0.8-1.el10_0
- java-1.8.0-openjdk-1:1.8.0.502.b07-1.1.el7_9
- java-1.8.0-openjdk-1:1.8.0.502.b07-1.1.el8
- java-17-openjdk-1:17.0.20.0.8-1.1.el8
- java-21-openjdk-1:21.0.12.0.8-1.1.el8
- java-1.8.0-ibm-1:1.8.0.8.70-1.el8_10
- java-1.8.0-openjdk-1:1.8.0.502.b07-1.2.el9
- java-17-openjdk-1:17.0.20.0.8-1.2.el9
- java-21-openjdk-1:21.0.12.0.8-1.2.el9
- java-25-openjdk-1:25.0.4.0.7-1.1.el9
- java-1.8.0-openjdk-1:1.8.0.502.b07-1.1.el9
- java-17-openjdk-1:17.0.20.0.8-1.1.el9
- java-21-openjdk-1:21.0.12.0.8-1.1.el9
- java-11-openjdk-1:11.0.32.0.9-1.el7_9
- java-11-openjdk-1:11.0.32.0.9-1.el8
- java-11-openjdk-1:11.0.32.0.9-1.el9
- java-25-openjdk-windows
- java-25-openjdk-portable-main-25.0.4.0.7-2.0.2.hum1
- java-21-openjdk-portable-main-21.0.12.0.8-0.1.hum1
- java-21-openjdk-main-21.0.12.0.8-0.1.hum1
- java-25-openjdk-main-25.0.4.0.7-1.1.1.hum1
- RHSA-2026:42881
- RHSA-2026:42882
- RHSA-2026:42889
- RHSA-2026:42893
- RHSA-2026:42897
- RHSA-2026:42898
- RHSA-2026:42900
- RHSA-2026:42878
- RHSA-2026:42879
- RHSA-2026:42895
- RHSA-2026:42899
- RHSA-2026:52948
- RHSA-2026:42876
- RHSA-2026:42877
- RHSA-2026:42887
- RHSA-2026:52949
Official advisory · high-confidence parse· fetched 18 days ago·verify at source
Mitigation
Upgrade to a fixed release: java-11-openjdk-portable, java-11-openjdk-windows, java-17-openjdk-portable, java-17-openjdk-windows, java-21-openjdk-portable, java-21-openjdk-windows. That is the remediation for this advisory.
The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.
Official advisory · high-confidence parse· fetched 18 days ago·verify at source
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