Cross-database write retargeting via unvalidated dotted database name in Client.BulkWrite in the MongoDB Go Driver
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.
CVE-2026-81521
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-81521
GO Driver
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "MongoDB",
"product": "GO Driver",
"versions": [
{
"status": "affected",
"version": "2.1.0",
"lessThan": "2.8.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "2.9.0",
"lessThan": "2.9.2",
"versionType": "semver"
}
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-81521
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #9521 · Revision 1
- Added to Heist Feed
- Publisher date