SB2026090256 - Input validation error in MongoDB Go Driver
Published: September 2, 2026
Security Bulletin ID
SB2026090256
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Input validation error (CVE-ID: CVE-2026-81521)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote user to redirect write operations to a different database or collection.
The vulnerability exists due to improper input validation in Client.BulkWrite when processing a caller-controlled database name containing a period character. A remote user can supply a crafted database name to redirect write operations to a different database or collection.
Remediation
Install update from vendor's website.