CVE-2026-9190

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.

Score

CVSS 3.1 9.1 Critical

Status

Analyzed - security@progress.com

Published

2026-08-05

Last modified

2026-10-24

Weaknesses

CWE-444

Affected products

• Marklogic Server (Progress)
• Marklogic Server (Progress Software Corporation)

References

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