CVE-2026-22007: Oracle Java SE Information Disclosure Bug

CVE-2026-22007 Overview

CVE-2026-22007 is a vulnerability in the Security component of Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition. This information disclosure vulnerability allows an unauthenticated attacker with local access to the infrastructure where the affected Java products execute to potentially gain unauthorized read access to a subset of accessible data.

The vulnerability is classified as CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) and requires local access with high attack complexity to exploit. While the impact is limited to confidentiality with no integrity or availability implications, organizations running affected Java versions should apply the appropriate patches to prevent potential information leakage.

Critical Impact

This vulnerability enables unauthorized read access to sensitive data through the Security component. It can be exploited via APIs in the affected component, including through web services that supply data to these APIs, as well as through sandboxed Java Web Start applications or Java applets that load and run untrusted code.

Affected Products

• 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

Discovery Timeline

• 2026-04-21 - CVE-2026-22007 published to NVD
• 2026-04-22 - Last updated in NVD database

Technical Details for CVE-2026-22007

Vulnerability Analysis

This vulnerability resides in the Security component of Oracle's Java runtime environments. The flaw enables an attacker with local system access to extract a subset of sensitive information from the affected Java deployment. The attack requires no user interaction or authentication, though it does demand high complexity to successfully execute.

The vulnerability impacts confidentiality by potentially exposing data that should otherwise be protected within the Java security sandbox. This is particularly concerning for environments that rely on Java's sandboxing capabilities to isolate untrusted code, such as Java Web Start applications or Java applets that load code from untrusted sources like the internet.

Root cause analysis indicates the vulnerability stems from improper information exposure handling within the Security component, allowing local attackers to bypass intended access restrictions and read protected data.

Root Cause

The vulnerability is caused by improper exposure of sensitive information (CWE-200) within the Security component of Oracle Java SE and related GraalVM products. The flaw allows unauthorized information disclosure when specific APIs in the Security component are invoked, either directly through local access or indirectly through web services that interact with these APIs.

Attack Vector

The attack requires local access to the infrastructure where the vulnerable Java environment executes. An unauthenticated attacker must overcome high complexity barriers to successfully exploit this vulnerability. The attack can be conducted through several vectors:

1. API Exploitation: Directly invoking vulnerable APIs within the Security component
2. Web Service Interaction: Leveraging web services that pass data to the affected APIs
3. Sandboxed Code Execution: Running malicious code within sandboxed Java Web Start applications or Java applets that rely on the Java sandbox for security

Upon successful exploitation, the attacker gains unauthorized read access to a subset of data accessible by the compromised Java environment. For technical details, refer to the Oracle Critical Patch Update.

Detection Methods for CVE-2026-22007

Indicators of Compromise

• Unusual access patterns to Java Security component APIs from local processes
• Unexpected data extraction or memory read operations targeting Java runtime environments
• Anomalous behavior from sandboxed Java applets or Web Start applications

Detection Strategies

• Monitor for suspicious local process access to Java runtime components, particularly the Security module
• Implement audit logging for API calls to sensitive Java Security component functions
• Deploy behavioral analysis to detect abnormal data access patterns in Java environments

Monitoring Recommendations

• Enable verbose logging for Java Security component operations in production environments
• Review system logs for unauthorized local access attempts to Java installation directories
• Monitor network traffic from web services that interact with Java Security APIs for anomalous patterns

How to Mitigate CVE-2026-22007

Immediate Actions Required

• Inventory all systems running affected versions of Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition
• Apply the security patch from Oracle's April 2026 Critical Patch Update immediately
• Restrict local access to systems running vulnerable Java deployments until patching is complete

Patch Information

Oracle has addressed this vulnerability in the April 2026 Critical Patch Update. Organizations should download and apply the appropriate patches from the Oracle Critical Patch Update advisory page. The patch updates the Security component to properly handle information exposure and prevent unauthorized data access.

Affected versions that require updates:

• Oracle Java SE: Upgrade from 8u481, 8u481-b50, 8u481-perf, 11.0.30, 17.0.18, 21.0.10, 25.0.2, or 26 to the latest patched versions
• Oracle GraalVM for JDK: Upgrade from 17.0.18 or 21.0.10 to patched versions
• Oracle GraalVM Enterprise Edition: Upgrade from 21.3.17 to the patched version

Workarounds

• Restrict local system access to only authorized personnel until patches can be applied
• Disable or restrict Java Web Start and Java applet functionality if not required for business operations
• Implement network segmentation to limit potential data exposure from compromised Java environments
• Consider using Java Security Manager policies to restrict sensitive API access where feasible

# Verify current Java version to assess vulnerability status
java -version

# Check installed Java locations on Linux/Unix systems
update-alternatives --list java

# Review Java security policy file for hardening options
cat $JAVA_HOME/lib/security/java.security