Vulnerability · Published Feb 10, 2026 · Assigned by mongodb
CVE-2026-1847MongoDB Server may crash when inserting large documents
Medium 6.5
In plain English
A medium-severity resource allocation without limits in MongoDB Server from MongoDB Inc. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 78.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| MongoDB Inc | MongoDB Server | 8.0 – before 8.0.187.0 – before 7.0.29 |
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H