CVE-2026-88032 — Application denial of service via cancellation race in reactive client-side encryption in MongoDB Java Driver

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
MongoDB / Java Driver	affected 4.2.0 before 5.11.1
MongoDB / org.mongodb:mongodb-crypt Maven package	affected 1.4.0 before 5.11.1
MongoDB / org.mongodb:mongodb-driver-reactivestreams Maven package	affected 4.6.0 before 5.11.1

CWE

CWE-416

References

https://jira.mongodb.org/browse/JAVA-6276

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.