A use-after-free in the reactive client-side encryption component of the MongoDB Java Driver can cause native resources to be freed while an affected encrypted operation is still using them when the operation is cancelled. A party able to cause such an operation to be cancelled may cause the hosting application process to terminate. Reaching the issue requires an affected reactive encryption configuration that retrieves KMS credentials on demand.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
MongoDB Java Driver unaffected
Version Status Constraints
4.2.0 affected < 5.11.1
MongoDB org.mongodb:mongodb-crypt Maven package unaffected
Version Status Constraints
1.4.0 affected < 5.11.1
MongoDB org.mongodb:mongodb-driver-reactivestreams Maven package unaffected
Version Status Constraints
4.6.0 affected < 5.11.1

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://jira.mongodb.org/browse/JAVA-6276 cve-icon cve-icon
History

Thu, 10 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 10 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Description A use-after-free in the reactive client-side encryption component of the MongoDB Java Driver can cause native resources to be freed while an affected encrypted operation is still using them when the operation is cancelled. A party able to cause such an operation to be cancelled may cause the hosting application process to terminate. Reaching the issue requires an affected reactive encryption configuration that retrieves KMS credentials on demand.
Title Application denial of service via cancellation race in reactive client-side encryption in MongoDB Java Driver
Weaknesses CWE-416
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mongodb

Published:

Updated: 2026-09-10T23:36:07.265Z

Reserved: 2026-09-09T19:49:39.184Z

Link: CVE-2026-88032

cve-icon Vulnrichment

Updated: 2026-09-10T18:28:38.587Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-10T19:17:40.533

Modified: 2026-09-11T00:19:58.350

Link: CVE-2026-88032

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-10T23:30:12Z

Weaknesses