CVE-2026-85949 in MarkLogic Server
Summary
by MITRE • 10/12/2026
Progress MarkLogic Server 12.x releases before 12.1.0 and 11.x releases before 11.3.7 may record security-sensitive information in diagnostic logs under certain configurations. An attacker with access to the affected logs could use this information to obtain unauthorized access to protected resources.
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Analysis
by VulDB Data Team • 10/12/2026
The vulnerability identified in Progress MarkLogic Server versions prior to 12.1.0 and 11.x releases before 11.3.7 represents a significant data exposure risk stemming from improper handling of diagnostic logging mechanisms. Under specific configuration scenarios, the application inadvertently records security-sensitive information within its log files. This flaw is categorized under CWE-532, which defines insertion of sensitive information into log files as a distinct class of software weakness. The core technical issue lies in the verbosity and scope of the diagnostic output generated by the server when operating with certain configurations enabled for troubleshooting or monitoring purposes. Instead of sanitizing or omitting high-value credentials, session tokens, or internal state data that may be processed during request handling, the logging subsystem captures these elements in plaintext within accessible log directories.
From an operational perspective, this vulnerability allows any attacker who gains access to the server's file system or has read permissions on the diagnostic logs to extract critical authentication material and other confidential data. The presence of such sensitive information in plain text significantly lowers the barrier for unauthorized access. An adversary can parse these logs to harvest valid credentials, session identifiers, or internal API keys that were logged during normal operation. This capability directly facilitates privilege escalation and lateral movement within the network environment where MarkLogic is deployed. By leveraging this leaked data, an attacker can bypass authentication controls entirely, gaining direct entry into protected resources without needing to exploit additional software flaws or perform complex cryptographic attacks against stored passwords.
The impact of this vulnerability extends beyond simple unauthorized access. It compromises the confidentiality and integrity of the entire database management system if sensitive query structures, schema definitions, or proprietary data patterns are also inadvertently logged depending on the specific configuration triggers. This exposure violates fundamental security principles regarding least privilege and secure logging practices. Organizations relying on MarkLogic for critical data storage must recognize that diagnostic logs are often stored in locations with broader access permissions than the application binaries themselves, creating a secondary attack vector through log file exfiltration or local privilege escalation techniques aimed at reading these files.
To mitigate this risk, administrators should immediately upgrade to Progress MarkLogic Server version 12.1.0 or later for the 12.x branch, and version 11.3.7 or later for the 11.x branch, as these releases address the logging behavior that leads to data exposure. In environments where upgrading is not immediately feasible, it is imperative to review current server configurations to disable any diagnostic modes that are known to produce verbose output containing sensitive payloads. Access controls on log directories must be strictly enforced using operating system-level permissions to ensure that only authorized administrative accounts can read these files. Furthermore, implementing a centralized logging solution with built-in redaction capabilities or regular rotation and secure archival processes can help minimize the window of exposure for any inadvertently captured data. Security teams should also audit existing logs for residual sensitive information before applying patches to prevent ongoing exploitation by insiders or attackers who have already gained limited file system access. This vulnerability aligns with ATT&CK technique T1078, Valid Accounts, as it enables adversaries to use legitimate credentials obtained from log files to authenticate and move laterally within the target network infrastructure.