Is CVE-2026-1847 in the CISA KEV catalog?

No. CVE-2026-1847 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-1847?

CVE-2026-1847 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2026-1847?

CVE-2026-1847 has an EPSS score of 0.24% (15th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-1847?

Upgrade MongoDB to 7.0.29 or later.

CVE & CISA-KEV Catalog

CVE-2026-1847

MEDIUM

6.5

CVSS v3

NVD

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.

CWE-770Allocation of Resources Without Limits or Throttling

How to fix

Remediation Available

MongoDBWindows application

Affected:7.0.0 7.0.29Fixed in:7.0.29MongoDB Inc.

Affected:8.2.0 8.2.4Fixed in:8.2.4MongoDB Inc.

Affected:8.0.0 8.0.18Fixed in:8.0.18MongoDB Inc.

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.24%probability of exploitation in 30 days

15thpercentile

Low risk: more likely to be exploited than 15% of all known CVEs.

References

Vendor Advisory1

jira.mongodb.org

Related Vulnerabilities

Other CWE-770 (Allocation of Resources Without Limits or Throttling) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-50387	High	7.5	100%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2019-11479	High	7.5	92%	-	Fix
CVE-2024-27316	High	7.5	91%	-	Fix
CVE-2022-30522	High	7.5	90%	-	Fix
CVE-2019-9515	High	7.5	88%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-02-25.