What’s Vulnerable › Vulnerabilities
CVE-2026-9190: HTTP request smuggling in Progress MarkLogic Server
- Severity: critical (CVSS 9.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.7% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-05 · updated 2026-10-24
- Weakness: CWE-444
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.
Affected products
- Progress Software Corporation MarkLogic Server: before 11.3.6; from 12.0.0 before 12.0.3 — fixed in 11.3.6, 12.0.3
How to fix
Upgrade to a fixed version: Progress Software Corporation MarkLogic Server 11.3.6, 12.0.3. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-9190 or the next vulnerability affects your stack