by Kastro
Paper/Archive/CVE-2026-9190

CVE-2026-9190

Progress Software Corporation MarkLogic Server — HTTP request smuggling in Progress MarkLogic Server

EPSS 0.7%CVSS 9.1
critical.is priorityof 100
38
CVSS 9.1 (CNA)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 54.5.545 × 2010.9No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
MarkLogic Server11.0.0 – < 11.3.611.3.6CNA
MarkLogic Server12.0.0 – < 12.0.312.0.3CNA

Scores by source

ProgressSoftware (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorycommunity.progress.com/s/article/Marklogic-Critical-Security-Alert-Bulletin-August-2026