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Vulnerabilities

Vulnerability · 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.

Published Feb 10, 2026 · catalog updated Jun 17, 2026 · Inserting certain large documents

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-1847. EPSS is 0.28%. Act only if a listed version of Inserting certain large documents is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Inserting certain large documents).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.28%
Remediation
Version ranges on file
Affected products
cpe mongodb/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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe mongodb/mongodb< 7.0.29
  • cpe mongodb/mongodb< 8.0.18
  • cpe mongodb/mongodb< 8.2.4

How to fix CVE-2026-1847

  • Upgrade

    CVE-2026-1847 lists a fix boundary at 7.0.29. Compare the installed build with that boundary before you change production.

  • Version check

    Affected < 7.0.29

  • Advisory

    Open the inventory_high record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-1847. EPSS is 0.28%. Act only if a listed version of Inserting certain large documents is installed.

Which versions are affected?

Compare what you have installed with < 7.0.29, < 8.0.18, < 8.2.4. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-770: Allocation of Resources Without Limits or Throttling. EPSS 0.28%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

MongoDB security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 10, 2026 · Monitored products — high

    Detected

    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.

  2. Jun 17, 2026 · Monitored products — high

    Updated

    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.

Sources

  • Monitored products — highVendor advisoryCVE-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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Monitored products — highNov 1, 2026