Vulnerability in Progress Marklogic Server
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.
Vulnerability class: HTTP Request Smuggling
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.007 (54.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Progress Marklogic Server
- Progress Software Corporation Marklogic Server — versions 11.0.0, 12.0.0
Weakness classification (CWE)
References
- community.progress.com/s/article/Marklogic-Critical-Security-Alert-Bulletin-Aug… (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-9190?
- CVE-2026-9190 is a critical-severity vulnerability in Progress Marklogic Server, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 9.1/10. Published 2026-08-05.
- How severe is CVE-2026-9190?
- Critical severity. CVSS v3 base score is 9.1 out of 10.