CVE-2026-81521: Cross-database write retargeting via unvalidated dotted database name in Client.BulkWrite in the MongoDB Go Driver
MongoDB · GO Driver
Vendor fix available · Affected: MongoDB GO Driver · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 14% of scored CVEs
DescriptionCVE.org
The MongoDB Go Driver's client-level bulk write operation may accept a caller-supplied database name containing a reserved separator character without escaping it before the name is used to build the target namespace for the operation. An application that passes untrusted input as a database name could therefore have the write directed at a database and collection other than the ones it intended. Only the Client.BulkWrite API is affected.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- MongoDB · GO Driverfrom 2.1.0 before 2.8.2; from 2.9.0 before 2.9.2
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- MongoDB
- Published
- August 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-81521 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.