Exploitable UAF in MongoDB Java Driver Reactive CS Encryption
CVE-2026-88032 Published on September 10, 2026
Application denial of service via cancellation race in reactive client-side encryption in MongoDB Java Driver
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.
Vulnerability Analysis
CVE-2026-88032 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2026-88032 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2026-88032
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Affected Versions
MongoDB Java Driver:- Version 4.2.0 and below 5.11.1 is affected.
- Version 1.4.0 and below 5.11.1 is affected.
- Version 4.6.0 and below 5.11.1 is affected.