CVE-2026-9190: An HTTP request smuggling vulnerability in the HTTP App Server of Progress MarkLogic Server before 11.3.6 and

This month

CRITICAL 9.1REMOTEUPGRADE

CVE-2026-9190 is a critical-severity flaw (CVSS 9.1) affecting marklogic server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 differe

Why this priority

Critical severity
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-444
Published	2026-08-05
Last modified	2026-10-24

Publisher (CNA): Progress Software Corporation · Vendor: progress

Am I affected?

Timeline

2026-08-05 16:17 UTCPublished CVE record published
2026-10-24 13:10 UTCUpdated Record last modified

progress marklogic server UPGRADE

Affected: < 11.3.6 · >= 12.0.0 and < 12.0.3

Fixed in: 11.3.6, 12.0.3

Safe to downgrade to: a release before 12.0.0

1. Check installed version

apt-cache policy marklogic-server || rpm -q marklogic-server || marklogic-server --version

2. UPGRADE to 11.3.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade marklogic-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade marklogic-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 12.0.0 (Debian / Ubuntu)

apt-cache madison marklogic-server sudo apt install marklogic-server=<VERSION_BEFORE_12.0.0> sudo apt-mark hold marklogic-server

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list marklogic-server sudo dnf downgrade marklogic-server-<VERSION_BEFORE_12.0.0> sudo dnf versionlock add marklogic-server

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Fedora 46 · python-streamlink · FIXED · 8.6.2-1.fc46 · FEDORA-2026-a56fcfdc08 · source

sudo dnf upgrade --advisory=FEDORA-2026-a56fcfdc08

Fedora ELN · valgrind · FIXED · 3.28.0-1.eln159 · FEDORA-2026-c593ef1d15 · source

sudo dnf upgrade --advisory=FEDORA-2026-c593ef1d15

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-9190?

marklogic server: upgrade to 11.3.6, 12.0.3. Exact commands for each OS are on this page.

Is CVE-2026-9190 being exploited?

CVE-2026-9190 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-9190 affect?

CVE-2026-9190 affects marklogic server. Severity is critical (CVSS 9.1). 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

How urgent is CVE-2026-9190?

Priority 53/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-9192 CRITICAL 9.8 UPGRADE An authentication bypass vulnerability in the ODBC App Server of Progress MarkLogic Server before 11.3.6 and 1
CVE-2026-7557 CRITICAL 9.1 UPGRADE An improper verification of cryptographic signature vulnerability in the SAML authentication module of Progres
CVE-2026-9195 CRITICAL 9.3 UPGRADE A cross-site scripting vulnerability in the Query Console of Progress MarkLogic Server before 11.3.6 and 12.0.
CVE-2026-8709 CRITICAL 9.9 UPGRADE An improper privilege management vulnerability in the REST API document patch operation of Progress MarkLogic
CVE-2026-9193 CRITICAL 9.9 UPGRADE An improper privilege management vulnerability in the Hadoop integration of Progress MarkLogic Server before 1

References

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