What is CVE-2026-1847?

CVE-2026-1847 is a medium-severity vulnerability in MongoDB, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-02-10.

How severe is CVE-2026-1847?

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

Resource exhaustion in MongoDB

CVE-2026-1847

Inserting certain large documents into a replica set could lead to replica set secondaries not being able to fetch the oplog from the primary. This could stall replication inside the replica set leading to server crash.

Published 2026-02-10 · 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 (15.8th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000

Affected products

MongoDB
MongoDB Inc Server — versions 8.0, 7.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

jira.mongodb.org/browse/SERVER-113532 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-1847?: CVE-2026-1847 is a medium-severity vulnerability in MongoDB, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-02-10.
How severe is CVE-2026-1847?: Medium severity. CVSS v3 base score is 6.5 out of 10.