CVE•Published 2026-08-27•Modified 2026-10-06•0 articles on news•4 live references•NVD data

CVE-2026-81521Mongodb · Go_driver

Vulnerability data via NVD (ingested)

CVSS v3.1

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS percentile

Exploit Prediction Scoring System · top 73% of all CVEs

Weaknesses (CWE)

CWE-99Improper Control of Resource Identifiers ('Resource Injection')

Description

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.

Timeline

Published 2026-08-27

Modified 2026-10-06

External references

NVD MITRE trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-81521

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Mongodb Go Driver"

All exposed Mongodb Go Driver instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Go Driver"

HTTP body or banner mentions "Go Driver" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-81521