CVE-2026-88032
Application denial of service via cancellation race in reactive client-side encryption in MongoDB Java Driver
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-416 |
| Vendor | mongodb |
| Product | java driver |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 10, 2026 |
| Last Updated | Sep 10, 2026 |
Stay Ahead of the Next One
Get instant alerts for mongodb java driver
Be the first to know when new medium vulnerabilities affecting mongodb java driver are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
MongoDB / Java Driver
4.2.0 < 5.11.1
MongoDB / org.mongodb:mongodb-crypt Maven package
1.4.0 < 5.11.1
MongoDB / org.mongodb:mongodb-driver-reactivestreams Maven package
4.6.0 < 5.11.1