CVE-2026-1966: YugabyteDB Information Disclosure Flaw

CVE-2026-1966 Overview

CVE-2026-1966 is a sensitive data exposure vulnerability in YugabyteDB Anywhere that displays LDAP bind passwords configured via gflags in cleartext within the web UI. An authenticated user with access to the configuration view could obtain LDAP credentials, potentially enabling unauthorized access to external directory services.

Critical Impact

Exposure of LDAP bind passwords could allow attackers to authenticate to external directory services, potentially compromising user accounts, accessing sensitive organizational data, or facilitating lateral movement within the network.

Affected Products

• YugabyteDB Anywhere (versions with LDAP configuration via gflags)

Discovery Timeline

• 2026-02-05 - CVE CVE-2026-1966 published to NVD
• 2026-02-05 - Last updated in NVD database

Technical Details for CVE-2026-1966

Vulnerability Analysis

This vulnerability is classified under CWE-522 (Insufficiently Protected Credentials), which occurs when an application transmits or stores authentication credentials in a manner that is susceptible to interception or retrieval by unauthorized actors.

The vulnerability arises from improper handling of sensitive configuration data in YugabyteDB Anywhere's web interface. When administrators configure LDAP integration using gflags (Google flags framework), the LDAP bind password is displayed in cleartext within the configuration view accessible through the web UI. This means any authenticated user who can navigate to the configuration interface can view the actual LDAP credentials without any obfuscation or masking.

The attack requires physical access to a system with an active authenticated session, high-complexity attack conditions, privileged access rights, and active user interaction—all factors that limit the exploitability of this vulnerability. However, the downstream impact on external directory services could be significant if credentials are compromised.

Root Cause

The root cause of this vulnerability is the failure to implement proper credential masking or encryption when displaying sensitive configuration parameters in the web user interface. The gflags configuration system stores the LDAP bind password, and when this value is rendered in the UI, no sanitization or obfuscation is applied before presentation to the user.

This represents a violation of the principle of least privilege and secure credential storage practices, as sensitive authentication data should never be displayed in cleartext, even to privileged users.

Attack Vector

The attack vector for CVE-2026-1966 requires physical access to a workstation where a privileged user has an active authenticated session to YugabyteDB Anywhere. An attacker would need to:

1. Gain physical access to a system with an active session
2. Navigate to the configuration view in the YugabyteDB Anywhere web interface
3. Locate the LDAP configuration section displaying gflags parameters
4. Extract the cleartext LDAP bind password

Once obtained, the LDAP credentials could be used to authenticate to the organization's directory services, potentially enabling enumeration of user accounts, group memberships, and other sensitive directory information. This could facilitate further attacks against Active Directory or other LDAP-backed authentication systems.

Detection Methods for CVE-2026-1966

Indicators of Compromise

• Unusual access patterns to YugabyteDB Anywhere configuration pages by non-administrative users
• Unexpected LDAP bind attempts from unfamiliar IP addresses using the configured service account
• Audit log entries showing repeated access to configuration views without corresponding administrative changes
• Authentication attempts to directory services from systems not typically associated with YugabyteDB operations

Detection Strategies

• Enable comprehensive audit logging for all configuration page access within YugabyteDB Anywhere
• Monitor LDAP server logs for bind attempts using the YugabyteDB service account from unexpected sources
• Implement alerting for configuration view access outside of normal administrative windows
• Deploy user behavior analytics to detect anomalous access patterns to sensitive configuration areas

Monitoring Recommendations

• Configure SIEM rules to correlate YugabyteDB configuration access with subsequent LDAP authentication events
• Establish baseline access patterns for configuration views and alert on deviations
• Monitor for credential stuffing or enumeration attempts against directory services using the exposed credentials
• Implement real-time alerting for any access to the LDAP configuration section

How to Mitigate CVE-2026-1966

Immediate Actions Required

• Restrict access to YugabyteDB Anywhere configuration views to only essential administrative personnel
• Rotate LDAP bind credentials if there is any suspicion they may have been viewed by unauthorized users
• Implement additional network segmentation between YugabyteDB Anywhere and directory services
• Enable audit logging to track all access to configuration pages

Patch Information

Users should consult the Yugabyte Vulnerability Disclosure Policy for official guidance on obtaining patches and security updates. Contact Yugabyte support to confirm the availability of a fix and the recommended upgrade path for your deployment.

Workarounds

• Implement role-based access control to limit configuration view access to only essential administrators
• Consider configuring LDAP credentials through environment variables or secure vaults instead of gflags where possible
• Use network-level access controls to restrict who can reach the YugabyteDB Anywhere web interface
• Implement session timeouts and automatic logout to reduce the window of opportunity for physical access attacks
• Deploy privileged access management (PAM) solutions to control and audit administrative access to the platform

# Example: Restrict network access to YugabyteDB Anywhere web interface
# Add firewall rules to limit access to administrative subnets only
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP