How severe is CVE-2026-1847?

CVE-2026-1847 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-1847 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-1847?

CVE-2026-1847 affects Mongodb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-1847?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-1847 have an EU (EUVD) identifier?

Yes. CVE-2026-1847 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6736.

When was CVE-2026-1847 published?

CVE-2026-1847 was published on 2026-02-10 and last updated on 2026-06-17.

CVE-2026-1847

CVE-2026-1847 is a medium-severity vulnerability in Mongodb with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6736
Weakness: CWE-770
Affected product: Mongodb
Published: 2026-02-10
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-1847?: CVE-2026-1847 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-1847 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-1847?: CVE-2026-1847 affects Mongodb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-1847?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-1847 have an EU (EUVD) identifier?: Yes. CVE-2026-1847 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6736.
When was CVE-2026-1847 published?: CVE-2026-1847 was published on 2026-02-10 and last updated on 2026-06-17.

References

https://jira.mongodb.org/browse/SERVER-113532

Affected products (1)

cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*

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CVE-2025-11832 — Critical (CVSS 9.8): Allocation of Resources Without Limits or Throttling vulnerability in Azure Access Technology BLU-IC2, Azure Access…
CVE-2024-44241 — Critical (CVSS 9.8): The issue was addressed with improved bounds checks. This issue is fixed in iOS 18.1 and iPadOS 18.1, macOS Sequoia…
CVE-2022-3439 — Critical (CVSS 9.8): Allocation of Resources Without Limits or Throttling in GitHub repository ikus060/rdiffweb prior to 2.5.0.

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Threat intelligence

Threat-intel indicators referencing this CVE:

1.234.27.159 (ipv4-addr)
103.7.41.117 (ipv4-addr)
167.71.60.5 (ipv4-addr)