CVE•Published 2026-09-03•Modified 2026-09-03•0 articles on news•5 live references•NVD data
CVE-2026-84966
Vulnerability data via NVD (ingested)
CVSS v3.1
5.1
MEDIUM
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS percentile
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Weaknesses (CWE)
Description
An incorrect numeric type conversion in the BSON document building component of the MongoDB C++ Driver may cause a length value to be interpreted incorrectly. When an application supplies an extremely large, non-terminated field name to the builder, the library may read memory outside the intended buffer and terminate the calling process. No authentication is required, but the calling application must pass the oversized name in a specific form.
Timeline
Published 2026-09-03
Modified 2026-09-03
External references
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).
More intel sources (5)
Shodan report
vuln:CVE-2026-84966Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-84966Censys host search filtered to this CVE id.
grep.app
CVE-2026-84966Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-84966GitHub code search for direct mentions.
Google dork
"CVE-2026-84966" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-84966 on GitHub.
We haven't classified any articles referencing CVE-2026-84966 yet. The external references above still apply.