CVE-2026-13061
Received Received - Intake

Session Metadata Exposure via $listSessions Aggregation in MongoDB

Publication date: 2026-07-22

Last updated on: 2026-07-22

Assigner: MongoDB, Inc.

Description
An authenticated user may be able to view session metadata belonging to other users on the system through the $listSessions aggregation stage. This information is normally restricted to users with cluster-level administrative privileges, and includes active session identifiers, associated usernames, and activity timestamps.

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Meta Information

Published
2026-07-22
Last Modified
2026-07-22
Generated
2026-07-23
AI Q&A
2026-07-22
EPSS Evaluated
N/A
NVD
CVE-2026-13061
EUVD
EUVD-2026-47800

Affected Vendors & Products

Currently, no data is known.

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Attack-Flow Graph

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Executive Summary

This vulnerability allows an authenticated user to view session metadata of other users through the $listSessions aggregation stage. Normally, this data is restricted to cluster-level administrators and includes session IDs, usernames, and timestamps.

Impact Analysis

An attacker could exploit this to gather sensitive session information, potentially leading to unauthorized access or session hijacking. This compromises user privacy and system security.

Compliance Impact

This vulnerability may violate data protection regulations like GDPR or HIPAA by exposing sensitive user session data. It undermines privacy requirements and could lead to compliance violations.

Mitigation Strategies

Update MongoDB to the latest patched version immediately to address the session metadata exposure via the $listSessions aggregation stage. Restrict user privileges to the minimum required and review all active sessions for suspicious activity.

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