CVE-2026-9190
Received Received - Intake

HTTP Request Smuggling in Progress MarkLogic Server

Publication date: 2026-08-05

Last updated on: 2026-08-05

Assigner: Progress Software Corporation

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.

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Meta Information

Published
2026-08-05
Last Modified
2026-08-05
Generated
2026-08-05
AI Q&A
2026-08-05
EPSS Evaluated
N/A
NVD
CVE-2026-9190
EUVD
EUVD-2026-53426

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
progress marklogic_server to 12.0.3 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-444 The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

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Executive Summary

This is an HTTP request smuggling vulnerability in Progress MarkLogic Server's HTTP App Server. It allows a remote attacker to bypass authentication and authorization checks by sending a crafted HTTP request with conflicting Content-Length and Transfer-Encoding headers. This causes the reverse proxy and MarkLogic Server to interpret request boundaries differently, enabling session hijacking or credential capture.

Detection Guidance

Detecting HTTP request smuggling vulnerabilities typically involves analyzing HTTP traffic for inconsistencies in how servers interpret request headers like Content-Length and Transfer-Encoding. Use tools like Burp Suite, OWASP ZAP, or tcpdump to inspect traffic between reverse proxies and MarkLogic servers. Look for cases where requests with conflicting headers are processed differently by the proxy and backend server.

Impact Analysis

An attacker could exploit this to bypass security controls, access unauthorized data, hijack user sessions, or steal credentials. This could lead to data breaches, unauthorized system access, or further network compromise depending on the server's role and data stored.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating compliance requirements for GDPR (data protection), HIPAA (health information), and other regulations. Organizations may face legal penalties, reputational damage, and loss of trust due to data breaches resulting from this issue.

Mitigation Strategies

Immediately upgrade MarkLogic Server to version 11.3.6, 12.0.3, or later to patch the vulnerability. If upgrading is not immediately possible, review and adjust reverse proxy configurations to ensure consistent handling of Content-Length and Transfer-Encoding headers. Disable or restrict access to the vulnerable HTTP App Server interface until patched.

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