CVE-2026-34273: Oracle GoldenGate Info Disclosure Flaw

CVE-2026-34273 Overview

CVE-2026-34273 is an information exposure vulnerability affecting the Libraries component of Oracle GoldenGate. This vulnerability allows unauthenticated attackers with network access via HTTP to compromise Oracle GoldenGate systems, resulting in unauthorized read access to a subset of accessible data. The vulnerability is classified under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor).

Critical Impact

Unauthenticated attackers can exploit this vulnerability remotely via HTTP to gain unauthorized access to sensitive Oracle GoldenGate data without requiring user interaction or special privileges.

Affected Products

• Oracle GoldenGate versions 23.4 through 23.10
• Oracle GoldenGate Libraries component

Discovery Timeline

• April 21, 2026 - CVE-2026-34273 published to NVD
• April 22, 2026 - Last updated in NVD database

Technical Details for CVE-2026-34273

Vulnerability Analysis

This vulnerability exists within the Libraries component of Oracle GoldenGate and represents an information disclosure weakness. The flaw allows unauthenticated remote attackers to access a subset of data that should otherwise be protected. The vulnerability requires no authentication credentials, no user interaction, and can be exploited over the network via standard HTTP protocols, making it particularly accessible to potential attackers.

The vulnerability is classified as CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor), indicating that sensitive data is being improperly exposed to users who should not have access to it. While the scope is unchanged and integrity/availability are not impacted, the confidentiality impact allows partial disclosure of protected information.

Root Cause

The root cause lies in improper access controls or input validation within the Oracle GoldenGate Libraries component. The vulnerability enables information exposure where data that should be restricted is accessible to unauthenticated users. This type of flaw typically occurs when authentication checks are missing or improperly implemented in specific API endpoints or data retrieval functions.

Attack Vector

The attack vector is network-based, requiring only HTTP access to the vulnerable Oracle GoldenGate instance. An attacker does not need valid credentials, user interaction, or elevated privileges to exploit this vulnerability. The attack flow typically involves:

1. Identifying an exposed Oracle GoldenGate instance running versions 23.4 through 23.10
2. Sending crafted HTTP requests to the Libraries component
3. Receiving unauthorized data in the response that should be access-controlled

The vulnerability is described as "easily exploitable," indicating low attack complexity with no special conditions required for successful exploitation. For detailed technical information, refer to the Oracle Critical Patch Update April 2026.

Detection Methods for CVE-2026-34273

Indicators of Compromise

• Unexpected HTTP requests to Oracle GoldenGate Libraries endpoints from unauthorized sources
• Unusual data access patterns in Oracle GoldenGate audit logs
• Network traffic anomalies showing data exfiltration from GoldenGate instances
• Authentication bypass attempts or missing authentication entries in access logs

Detection Strategies

• Monitor Oracle GoldenGate access logs for unauthenticated HTTP requests to the Libraries component
• Implement network-level monitoring for unusual traffic patterns targeting GoldenGate instances
• Deploy SentinelOne Singularity platform for endpoint and network visibility to detect exploitation attempts
• Use intrusion detection systems (IDS) to identify suspicious HTTP traffic patterns targeting affected versions

Monitoring Recommendations

• Enable verbose logging on Oracle GoldenGate instances to capture detailed access information
• Configure alerts for any unauthenticated access attempts to GoldenGate services
• Regularly review network traffic logs for connections to Oracle GoldenGate from untrusted sources
• Implement real-time security monitoring with SentinelOne to detect and respond to potential exploitation

How to Mitigate CVE-2026-34273

Immediate Actions Required

• Identify all Oracle GoldenGate instances running versions 23.4 through 23.10 in your environment
• Apply the security patch from Oracle's April 2026 Critical Patch Update immediately
• Restrict network access to Oracle GoldenGate instances to authorized systems only
• Implement network segmentation to limit exposure of vulnerable components

Patch Information

Oracle has released a security patch addressing this vulnerability as part of the Oracle Critical Patch Update April 2026. Organizations should apply this patch to all affected Oracle GoldenGate installations running versions 23.4 through 23.10. The patch resolves the information exposure issue in the Libraries component.

Workarounds

• Implement firewall rules to restrict HTTP access to Oracle GoldenGate to trusted IP addresses only
• Place Oracle GoldenGate instances behind a reverse proxy with authentication requirements
• Disable or restrict access to the Libraries component if not required for operations
• Use network segmentation to isolate GoldenGate systems from untrusted networks

# Example firewall rule to restrict Oracle GoldenGate access
# Allow access only from trusted management networks
iptables -A INPUT -p tcp --dport 443 -s 10.0.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP