Vulnerability · Published Aug 28, 2026 · Assigned by mongodb
CVE-2026-76798MongoSQL Transition Readiness Tool Improper Output Encoding in Generated HTML Reports
Medium 6.3
In plain English
A medium-severity cross-site scripting in BI Connector Transition Readiness Report from MongoDB. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).
Official description
The MongoSQL Transition Readiness Tool writes query text and user names read from BI Connector log files into its generated HTML report without encoding them for that output context. A user able to issue queries through the BI Connector can influence log content so that markup supplied in a query is interpreted by the browser when an operator later generates and opens the report, which may disclose other users' logged query text and user names to an external party or present misleading content to the operator. Generating a report over logs containing the affected entries and opening that report in a browser is required.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| MongoDB | BI Connector Transition Readiness Report | 1.0.0 – before 1.1.3 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N