CVE-2026-88032

Application denial of service via cancellation race in reactive client-side encryption in MongoDB Java Driver

Published Sep 10, 2026 CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
References
History
Type Values Removed Values Added
CPEs cpe:2.3:a:mongodb:java_driver:*:*:*:*:*:mongodb:*:*
Type Values Removed Values Added
First Time appeared Mongodb
Mongodb java Driver
Mongodb org.mongodb:mongodb-crypt Maven Package
Mongodb org.mongodb:mongodb-driver-reactivestreams Maven Package
Vendors & Products Mongodb
Mongodb java Driver
Mongodb org.mongodb:mongodb-crypt Maven Package
Mongodb org.mongodb:mongodb-driver-reactivestreams Maven Package
Type Values Removed Values Added
Metrics ssvc

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

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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mongodb
Published
Updated
Sep 10, 2026, 11:36 PM
Reserved
Sep 9, 2026, 7:49 PM
Status
Analyzed
Published
Sep 10, 2026, 7:17 PM
Modified
Sep 16, 2026, 3:51 PM