What is CVE-2026-85976?

CVE-2026-85976 is a medium-severity vulnerability in Progress Software Corporation Marklogic Server, classified under HTTP Response Splitting. CVSS score: 5.4/10. Published 2026-10-12.

How severe is CVE-2026-85976?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Progress Software Corporation Marklogic Server

CVE-2026-85976

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.

Published 2026-10-12.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Progress Software Corporation Marklogic Server

Weakness classification (CWE)

CWE-113 — HTTP Response Splitting

References

community.progress.com/s/article/Marklogic-Critical-Security-Alert-Bulletin-Oct… (vendor-advisory)

Frequently asked questions

What is CVE-2026-85976?: CVE-2026-85976 is a medium-severity vulnerability in Progress Software Corporation Marklogic Server, classified under HTTP Response Splitting. CVSS score: 5.4/10. Published 2026-10-12.
How severe is CVE-2026-85976?: Medium severity. CVSS v3 base score is 5.4 out of 10.