Is CVE-2026-9748 in the CISA KEV catalog?

No. CVE-2026-9748 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-9748?

CVE-2026-9748 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2026-9748?

CVE-2026-9748 has an EPSS score of 0.32% (24th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-9748?

Upgrade MongoDB to 8.2.10 or later.

CVE & CISA-KEV Catalog

CVE-2026-9748

MEDIUM

6.5

CVSS v3

NVD

Description

The $_internalConvertBucketIndexStats stage used PauseExecution as a way to signal "skip this document" when an index stats conversion failed. But PauseExecution is not a general purpose skip mechanism, but rather a TeeBuffer-internal signal used solely by $facet to coordinate its sub-pipelines. When this stage is placed before $facet in a pipeline, TeeBuffer receives the unexpected PauseExecution from upstream and hits a hard invariant assertion, crashing mongod.

CWE-617

How to fix

Remediation Available

MongoDBWindows application

Affected:8.2.0 8.2.10Fixed in:8.2.10MongoDB Inc.

Affected:7.0.0 7.0.35Fixed in:7.0.35MongoDB Inc.

Affected:8.0.0 8.0.10Fixed in:8.0.10MongoDB Inc.

Affected:8.3.0 8.3.3Fixed in:8.3.3MongoDB 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

0.32%probability of exploitation in 30 days

24thpercentile

Low risk: more likely to be exploited than 24% of all known CVEs.

References

Vendor Advisory1

jira.mongodb.org

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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 2026-06-15.