CVE-2026-85976: HTTP response splitting in Progress MarkLogic Server Query Console

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-12 · updated 2026-10-16
Weakness: CWE-113

Description

Progress MarkLogic Server 12.x releases before 12.1.0 and 11.x releases before 11.3.7 do not sufficiently sanitize input used by the Query Console file-exploration endpoint, which could allow HTTP response splitting and unintended client-side response handling.

Affected products

Progress Software Corporation MarkLogic Server: from 11.0.0 before 11.3.7; from 12.0.0 before 12.1.0 — fixed in 11.3.7, 12.1.0

How to fix

Upgrade to a fixed version: Progress Software Corporation MarkLogic Server 11.3.7, 12.1.0. Check the vendor advisory for mitigations.

References

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

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