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Advisory severityMedium5.3Red Hat Linux

Medium [CVE-2026-47027] Enhance Jar file processing (Oracle CPU 2026-07)

This medium-severity Red Hat Linux advisory covers CVE-2026-47027 affecting OPENJDK ELS 11.0.32, Red Hat Build of OpenJDK 17.0.20, Red Hat Build of OpenJDK 21.0.12.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-47027 Source published Source updated

VulniPulse record published Record updated

CVE-2026-47027
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

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Summary

Vulnerability in Oracle Java SE (component: Libraries). Supported versions that are affected are Oracle Java SE: 8u491, 8u491-perf, 11.0.31, 17.0.19, 21.0.11, 25.0.3, 26.0.1; Oracle GraalVM for JDK: 17.0.19 and 21.0.11; Oracle GraalVM Enterprise Edition: 21.3.18.

Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE.

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). A flaw was found in OpenJDK.

The processImpl() method in SignatureFileVerifier exhibits O(n^2) time complexity when verifying JAR files where different entries have different signer combinations, potentially leading to DoS. Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Affected versions
  • 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

Fixed versions
  • 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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