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CVE-2026-81520: CWE-1088: Synchronous Access of Remote Resource without Timeout in MongoDB BI Connector

0
High
VulnerabilityCVE-2026-81520cvecve-2026-81520cwe-1088
Published: 08/28/2026 (08/28/2026, 20:22:42 UTC)
Source: CVE Database V5
Vendor/Project: MongoDB
Product: BI Connector

Description

A network-reachable client that has not yet authenticated can hold a MongoDB Connector for BI authentication session open indefinitely by beginning a SASL-based login exchange and then declining to complete it. Because the negotiation loop had no overall time bound and the read from the client had no deadline, each such session retains a worker, a client connection slot, and its associated backend database connections until the process is restarted. Repeated use of this behavior can consume the configured connection capacity and prevent legitimate users from establishing new sessions.

CVSS v4.0

Score 8.7high

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vuln. Confidentiality
None
Vuln. Integrity
None
Vuln. Availability
High
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Technical Details

Data Version
5.2
Assigner Short Name
mongodb
Date Reserved
2026-08-26T22:10:21.151Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a9206c9acd9273b4963cf5f

Added to database: 08/28/2026, 22:08:09 UTC

Last updated: 08/29/2026, 02:52:07 UTC

Views: 9

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