Is CVE-2026-8199 in the CISA KEV catalog?

No. CVE-2026-8199 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-8199?

CVE-2026-8199 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2026-8199?

CVE-2026-8199 has an EPSS score of 0.26% (17th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-8199?

Upgrade MongoDB to 7.0.34 or later.

CVE & CISA-KEV Catalog

CVE-2026-8199

MEDIUM

6.5

CVSS v3

NVD

Description

An authenticated user can cause excess memory usage via bitwise match expression AST processing of $bitsAllSet, $bitsAnySet, $bitsAllClear, and $bitsAnyClear. This contributes to memory pressure and may lead to availability loss by OOM. This issue impacts MongoDB Server v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

CWE-1325

How to fix

Remediation Available

MongoDBWindows application

Affected:7.0.0 7.0.34Fixed in:7.0.34MongoDB Inc.

Affected:8.3.0 8.3.2Fixed in:8.3.2MongoDB Inc.

Affected:8.0.0 8.0.23Fixed in:8.0.23MongoDB Inc.

Affected:8.2.0 8.2.9Fixed in:8.2.9MongoDB 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

0.26%probability of exploitation in 30 days

17thpercentile

Low risk: more likely to be exploited than 17% 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 2026-05-13.