Progress MarkLogic Server: Path traversal and privilege flaw in legacy InfoStudio modules
Summary
Progress MarkLogic Server 11.x before 11.3.7 and 12.x before 12.1.0 contain privileged legacy InfoStudio modules that do not sufficiently validate user-controlled file paths and user-context values. An attacker with network access and low privileges could read server files without authorization or run actions under an unintended identity. CISA SSVC rates exploitation as none, the EPSS score is low, and no public exploit has been found.
Affected
- Per CVE record: MarkLogic Server 11.0.0 to before 11.3.7 and 12.0.0 to before 12.1.0. Default configuration: unaffected.
- The vendor bulletin table lists 11.0 to 11.3.6 and 12.0 to 12.0.3. This differs from the CVE record and must be verified with Progress.
Fixed in
- MarkLogic Server 12.1.0
- MarkLogic Server 11.3.7
- The upgrade also removes the InfoStudio component. Check the exact fixed builds in the vendor bulletin.
Workaround
- The CVE record contains no workaround.
- Third-party guidance (not verified by the vendor): disable or remove the legacy InfoStudio modules if an immediate upgrade is not possible, and restrict InfoStudio access to trusted, least-privilege roles.
Exploitation
- No exploitation in the wild known. No KEV listing found.
- CISA SSVC: exploitation none, automatable no, technical impact partial.
- EPSS 0.00297 at time of record (low).
- The vendor warns that affected instances may keep running normally without visible signs of exploitation.
Our recommendation
- Inventory all MarkLogic Server instances and their versions.
- Upgrade to 12.1.0 or 11.3.7 after confirming the build numbers in the vendor bulletin. The bulletin covers further issues, so patching is the main action.
- Until patched, restrict InfoStudio and administrative access to trusted staff and review admin and delegated-admin accounts.
- Check whether MarkLogic management or Query Console interfaces are reachable from outside the network and block external access.
- Monitor for unusual file access and administrative activity.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Progress MarkLogic Critical Security Alert Bulletin, October 2026 community.progress.com
- OpenCVE: CVE-2026-85953 app.opencve.io
- Strix: CVE-2026-85953 www.strix.ai
- The Hacker News: Two critical MarkLogic flaws thehackernews.com
- GBHackers: Critical Progress MarkLogic Server vulnerabilities gbhackers.com
- Rapid7 via Vulners: CVE-2026-85953 vulners.com
- VulDB: CVE-2026-85953 vuldb.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 10:56.
Original description (NVD)
Progress MarkLogic Server 12.x releases before 12.1.0 and 11.x releases before 11.3.7 contain privileged legacy InfoStudio modules that do not sufficiently validate user-controlled file paths and user-context values. Exploitation could result in unauthorized access to server files or execution under an unintended identity.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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