# CVE-2026-85965: Progress MarkLogic Server memory safety defect in JavaScript engine

Source: https://junglewise.ai/threats/cve-2026-85965-progress-marklogic-server-12-x-releases-before-12-1-0-and-11-x  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-12. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-85965 · Severity: high · CVSS 8 · Published 2026-10-12

Progress MarkLogic Server is a document database used for storing and managing large volumes of structured and unstructured data. The JavaScript engine integration contains memory-safety flaws that could allow attackers to corrupt memory, crash the server, or cause instability, potentially leading to data loss or service unavailability.

Technologies: [Progress Marklogic Server](https://junglewise.ai/threats/technologies/marklogic-server). Vendors: [Progress](https://junglewise.ai/threats/vendors/progress).

## Quick answers

**Is CVE-2026-85965 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-85965 being exploited in the wild.

**How severe is CVE-2026-85965?** High severity, with a CVSS score of 8, published 12 October 2026.

**Which products and versions are affected?** Progress Marklogic Server 12.x before 12.1.0, 11.x before 11.3.7.

**Is there a fix for CVE-2026-85965?** Yes: fixed in MarkLogic Server 12.1.0, 11.3.7. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-85965 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-85965?** Check whether you run Progress Marklogic Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in MarkLogic Server 12.1.0, 11.3.7

## Technical details

Memory-safety defects exist in the JavaScript engine integration within MarkLogic Server, allowing memory corruption and controlled process failure. The vulnerability affects the JavaScript interpreter component and can be triggered during JavaScript execution within the server. Fixes are available in version 12.1.0 and 11.3.7.

## Affected products

- Progress MarkLogic Server 12.x before 12.1.0, 11.x before 11.3.7

## Timeline

- 2026-10-12: disclosed

## References

- [https://community.progress.com/s/article/Marklogic-Critical-Security-Alert-Bulletin-October-2026](https://community.progress.com/s/article/Marklogic-Critical-Security-Alert-Bulletin-October-2026)

## Related threats

- [Progress MarkLogic Server HTTP response splitting in Query Console](https://junglewise.ai/threats/cve-2026-85976-progress-marklogic-server-12-x-releases-before-12-1-0-and-11-x)
- [Progress MarkLogic Server cleartext S3 transport default](https://junglewise.ai/threats/cve-2026-85975-progress-marklogic-server-12-x-releases-before-12-1-0-and-11-x)
- [Progress MarkLogic Server TLS hostname validation bypass](https://junglewise.ai/threats/cve-2026-85974-progress-marklogic-server-12-x-releases-before-12-1-0-and-11-x)
- [Progress MarkLogic Server cleartext cluster-management communications](https://junglewise.ai/threats/cve-2026-85973-progress-marklogic-server-12-x-releases-before-12-1-0-may-use)
- [Progress MarkLogic Server Kerberos authentication verification bypass](https://junglewise.ai/threats/cve-2026-85972-progress-marklogic-server-12-x-releases-before-12-1-0-and-11-x)