How severe is CVE-2026-8199?

CVE-2026-8199 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-2026-8199 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-8199?

CVE-2026-8199 affects Mongodb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-8199?

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

Does CVE-2026-8199 have an EU (EUVD) identifier?

Yes. CVE-2026-8199 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29890.

When was CVE-2026-8199 published?

CVE-2026-8199 was published on 2026-05-13 and last updated on 2026-06-17.

CVE-2026-8199

CVE-2026-8199 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-1325.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29890
Weakness: CWE-1325
Affected product: Mongodb
Published: 2026-05-13
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-8199?: 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.
How severe is CVE-2026-8199?: CVE-2026-8199 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-2026-8199 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-8199?: CVE-2026-8199 affects Mongodb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-8199?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-8199 have an EU (EUVD) identifier?: Yes. CVE-2026-8199 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29890.
When was CVE-2026-8199 published?: CVE-2026-8199 was published on 2026-05-13 and last updated on 2026-06-17.

References

https://jira.mongodb.org/browse/SERVER-122449

Affected products (1)

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

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Other CWE-1325 vulnerabilities

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Threat intelligence

Threat-intel indicators referencing this CVE:

161.97.123.14 (ipv4-addr)