How severe is CVE-2026-9203?

CVE-2026-9203 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-9203 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-9203?

CVE-2026-9203 affects Progress Marklogic Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-9203?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-9203 published?

CVE-2026-9203 was published on 2026-08-05 and last updated on 2026-09-03.

CVE-2026-9203

CVE-2026-9203 is a high-severity vulnerability in Progress Marklogic Server with a CVSS 3.x base score of 8.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: High (CVSS 3.x base score 8.5)
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Progress Marklogic Server
Published: 2026-08-05
Last modified: 2026-09-03

Description

A server-side request forgery vulnerability in Progress MarkLogic Server before 11.3.6 and 12.0.3 allows an authenticated user with low-privileged roles to bypass protections for cloud instance metadata endpoints. Successful exploitation can disclose cloud credentials and compromise cloud resources accessible to the host instance.

Frequently asked questions

What is CVE-2026-9203?: A server-side request forgery vulnerability in Progress MarkLogic Server before 11.3.6 and 12.0.3 allows an authenticated user with low-privileged roles to bypass protections for cloud instance metadata endpoints. Successful exploitation can disclose cloud credentials and compromise cloud resources accessible to the host instance.
How severe is CVE-2026-9203?: CVE-2026-9203 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-9203 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-9203?: CVE-2026-9203 affects Progress Marklogic Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-9203?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-9203 published?: CVE-2026-9203 was published on 2026-08-05 and last updated on 2026-09-03.

References

https://community.progress.com/s/article/Marklogic-Critical-Security-Alert-Bulletin-August-2026

Affected products (1)

cpe:2.3:a:progress:marklogic_server:*:*:*:*:*:*:*:*

More vulnerabilities in Progress Marklogic Server

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CVE-2026-7329 — Critical (CVSS 9.9): An improper privilege management vulnerability in the SQL, SPARQL, and Optic REST query interfaces of Progress…
CVE-2026-9192 — Critical (CVSS 9.8): An authentication bypass vulnerability in the ODBC App Server of Progress MarkLogic Server before 11.3.6 and 12.0.3…
CVE-2026-9195 — Critical (CVSS 9.3): A cross-site scripting vulnerability in the Query Console of Progress MarkLogic Server before 11.3.6 and 12.0.3 allows…
CVE-2026-9190 — 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…

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