8.5High
Progress Marklogic Server
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.
What this means for your business
- It affects Progress Marklogic Server. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it remotely, over a network, with an ordinary user login, and without anyone at your company clicking anything.
- FIRST's prediction model gives it a 0.2% chance of attack attempts being seen in the next 30 days, ranking above 11% of all known flaws.
What to do
- 1Check whether your company or your suppliers run Progress Marklogic Server, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 8.5 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H- Weakness
- CWE-918
- Assigned by
- security@progress.com
Dates
- Published
- 2026-08-05
- Last modified
- 2026-09-03
- Sources
- NVD
Affected products
- Progress Marklogic Server- 11.3.6, 12.0.0 - 12.0.3
As listed in the NVD configuration data. Not a statement about your estate.