CVE-2026-9190

HTTP request smuggling in Progress MarkLogic Server

Published Aug 5, 2026 CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
Description
An HTTP request smuggling vulnerability in the HTTP App Server of Progress MarkLogic Server before 11.3.6 and 12.0.3 allows a remote attacker to bypass authentication and authorization checks, hijack a legitimate user's session, or capture credentials. The vulnerability occurs when a crafted HTTP request containing both Content-Length and Transfer-Encoding headers causes a reverse proxy and MarkLogic Server to interpret request boundaries differently.

Remediation

Vendor Workaround

Do not expose MarkLogic HTTP App Servers directly to untrusted networks. Configure a reverse proxy or web application firewall to reject requests that contain both Content-Length and Transfer-Encoding headers, and restrict access to trusted networks until the update can be applied.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Progress
Progress marklogic Server
CPEs cpe:2.3:a:progress:marklogic_server:*:*:*:*:*:*:*:*
Vendors & Products Progress
Progress marklogic Server
Type Values Removed Values Added
First Time appeared Progress Software Corporation
Progress Software Corporation marklogic Server
Vendors & Products Progress Software Corporation
Progress Software Corporation marklogic Server
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description An HTTP request smuggling vulnerability in the HTTP App Server of Progress MarkLogic Server before 11.3.6 and 12.0.3 allows a remote attacker to bypass authentication and authorization checks, hijack a legitimate user's session, or capture credentials. The vulnerability occurs when a crafted HTTP request containing both Content-Length and Transfer-Encoding headers causes a reverse proxy and MarkLogic Server to interpret request boundaries differently.
Title HTTP request smuggling in Progress MarkLogic Server
Weaknesses CWE-444
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ProgressSoftware
Published
Updated
Aug 7, 2026, 3:55 AM
Reserved
May 21, 2026, 3:14 PM
Status
Analyzed
Published
Aug 5, 2026, 4:17 PM
Modified
Oct 24, 2026, 1:10 PM