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

> CVE-2026-88032: Application denial of service via cancellation race in reactive client-side encryption in MongoDB Java Driver. CVSS 5.9 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-88032
Last updated: 2026-09-16T15:51:16Z

- Published: 2026-09-10 18:02 UTC · Updated: 2026-09-16 15:51 UTC · Assigner: mongodb
- CVSS: 5.9 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS: 0.26%, 17th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-416

## 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 vendors and products

- MongoDB: Java Driver
- MongoDB: org.mongodb:mongodb-crypt Maven package
- MongoDB: org.mongodb:mongodb-driver-reactivestreams Maven package

## Tracked companies

- [MongoDB Atlas](https://rewindex.com/company/mongodb-atlas.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-88032)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-88032)
- [https://jira.mongodb.org/browse/JAVA-6276](https://jira.mongodb.org/browse/JAVA-6276)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-88032 · Markdown: https://rewindex.com/cve/CVE-2026-88032.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-88032 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:12:31.800Z