CVE-2026-88032

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

HIGH
7.5
CVSS Score
Published: September 10, 2026 at 06:02 PM UTC
Updated: September 16, 2026 at 04:07 PM UTC
2 products affected across 1 vendorJava DriverMongoDB Crypt

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Severity
HIGH7.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

4.2.0 ≤ v < 5.11.14.6.0 ≤ v < 5.11.14.2.04.6.0
Affected range stops below 5.11.1, so it looks safe — our inference, not a vendor statement
1.4.0 ≤ v < 5.11.11.4.0
Affected range stops below 5.11.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://jira.mongodb.org/browse/JAVA-6276

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-416

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