What is CVE-2025-7259?

CVE-2025-7259 is a medium-severity vulnerability in MongoDB, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 6.5/10. Published 2025-07-07.

How severe is CVE-2025-7259?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in MongoDB

CVE-2025-7259

An authorized user can issue queries with duplicate _id fields, that leads to unexpected behavior in MongoDB Server, which may result to crash. This issue can only be triggered by authorized users and cause Denial of Service. This issue affects MongoDB Server v8.1 version 8.1.0.

Published 2025-07-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (21.5th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

MongoDB — versions 8.1.0
MongoDB Inc Server — versions 8.1

Weakness classification (CWE)

CWE-843 — Access of Resource Using Incompatible Type (Type Confusion)

References

jira.mongodb.org/browse/SERVER-102693 (Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2025-7259?: CVE-2025-7259 is a medium-severity vulnerability in MongoDB, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 6.5/10. Published 2025-07-07.
How severe is CVE-2025-7259?: Medium severity. CVSS v3 base score is 6.5 out of 10.