Auth-bypass in an enterprise database HTTP server allowing session hijack/credential theft; affects deployed MarkLogic instances across organizations.
CVE-2026-9190
Auth bypass via HTTP request smuggling in Progress MarkLogic Server
Is CVE-2026-9190 being exploited?
Not confirmed. CVE-2026-9190 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.43% probability of exploitation in the next 30 days.
How severe is CVE-2026-9190?
CVE-2026-9190 is rated Critical with a CVSS score of 9.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-9190?
Yes. A fix has been recorded for CVE-2026-9190. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-9190 affect?
CVE-2026-9190 affects Progress MarkLogic Server HTTP App Server < 11.3.6, Progress MarkLogic Server < 12.0.3, Front-end reverse proxies that parse CL/TE differently. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-9190?
Apply vendor patches (11.3.6 / 12.0.3) or normalize/terminate conflicting CL/TE at proxies.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attackers can bypass authentication, hijack sessions, and capture credentials via crafted HTTP requests.
Immediate action required
- affected>= 11.0.0 and < 11.3.6
- affected>= 12.0.0 and < 12.0.3
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.