HTTP Request Smuggling in Progress MarkLogic Server
CVE-2026-9190

9.1CRITICAL

Key Information:

Vendor

Progress Software
Status
Marklogic Server
Vendor
CVE Published:
5 August 2026

What is CVE-2026-9190?

An HTTP request smuggling vulnerability has been discovered in Progress MarkLogic Server, affecting versions prior to 11.3.6 and 12.0.3. This vulnerability allows remote attackers to exploit an issue arising from the improper handling of crafted HTTP requests containing both Content-Length and Transfer-Encoding headers. As a result, attackers can bypass authentication and authorization checks, potentially enabling them to hijack legitimate user sessions or capture sensitive credentials. Proper remediation is essential to secure systems against this type of exploit.

Affected Version(s)

MarkLogic Server 11.0.0 < 11.3.6

MarkLogic Server 12.0.0 < 12.0.3

References

https://community.progress.com/s/article/Marklogic-Critic...
vendor-advisory

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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