MongoDB
CVE-2026-1847
MEDIUM
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
MongoDB replica set replication can be disrupted when oversized documents are inserted, preventing secondaries from synchronizing oplog entries with the primary and potentially causing server crashes. Authenticated users with write access can trigger this denial of service condition to destabilize replica set availability. No patch is currently available for this vulnerability.
Technical ContextAI
Classified as CWE-770 (Allocation of Resources Without Limits or Throttling). Affects Mongodb. 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.
RemediationAI
Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.
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Same technique Denial Of Service
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External POC / Exploit Code
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