How severe is CVE-2026-8063?

CVE-2026-8063 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-2026-8063 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-8063?

CVE-2026-8063 affects Mongodb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-8063?

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

Does CVE-2026-8063 have an EU (EUVD) identifier?

Yes. CVE-2026-8063 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28326.

When was CVE-2026-8063 published?

CVE-2026-8063 was published on 2026-05-07 and last updated on 2026-06-17.

CVE-2026-8063

CVE-2026-8063 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-476.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28326
Weakness: CWE-476
Affected product: Mongodb
Published: 2026-05-07
Last modified: 2026-06-17

Description

An authenticated user can crash mongod when running $rankFusion or $scoreFusion with an empty pipeline on a view. When resolving a view, the server inspects the aggregation pipeline to determine whether it begins with an Atlas Search stage. For $rankFusion and $scoreFusion, this inspection reads the first element on each stage’s input pipeline array without first verifying that the array is non-empty. Supplying an empty pipeline causes a null pointer dereference and crashes the server. This issue affects MongoDB Server 8.2 versions prior to 8.2.7.

Frequently asked questions

What is CVE-2026-8063?: An authenticated user can crash mongod when running $rankFusion or $scoreFusion with an empty pipeline on a view. When resolving a view, the server inspects the aggregation pipeline to determine whether it begins with an Atlas Search stage. For $rankFusion and $scoreFusion, this inspection reads the first element on each stage’s input pipeline array without first verifying that the array is non-empty. Supplying an empty pipeline causes a null pointer dereference and crashes the server. This issue affects MongoDB Server 8.2 versions prior to 8.2.7.
How severe is CVE-2026-8063?: CVE-2026-8063 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-2026-8063 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-8063?: CVE-2026-8063 affects Mongodb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-8063?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-8063 have an EU (EUVD) identifier?: Yes. CVE-2026-8063 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28326.
When was CVE-2026-8063 published?: CVE-2026-8063 was published on 2026-05-07 and last updated on 2026-06-17.

References

https://jira.mongodb.org/browse/SERVER-121851

Affected products (1)

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

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