CVE-2026-75855 ArcadeData CVE debrief

Who should care

Defenders responsible for ArcadeDB deployments, particularly those with authenticated root user access, should assess exposure and prioritize remediation. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify current version and exposure, and plan for upgrades or mitigations.

Why it matters

CVE-2026-75855 is a high-severity vulnerability in ArcadeDB that allows authenticated root users to write and delete arbitrary files. Defenders should prioritize verification, remediation, and monitoring to mitigate potential impacts.

• Potential for unauthorized file creation and deletion outside the configured database directory
• Possible disruption to server process and dependent systems
• Need for verification of current version and exposure to this vulnerability
• Priority for upgrading to version 26.8.1 or later

Technical summary

The vulnerability exists in the POST /api/v1/server endpoint's create database and drop database commands in ArcadeDB versions before 26.8.1. Authenticated root users can exploit this by providing database names with ../ sequences to create databases at arbitrary filesystem paths or recursively delete directories accessible by the server process. This can lead to potential unauthorized file creation and deletion outside the configured database directory, disrupting server processes and dependent systems. Defenders should prioritize verifying and upgrading to version 26.8.1 or later, restricting access to the /api/v1/server endpoint, and monitoring for suspicious database name activity.

Defensive priority

Defenders should prioritize verifying and upgrading to version 26.8.1 or later, restricting access to the /api/v1/server endpoint, and monitoring for suspicious database name activity.

Recommended defensive actions

• Verify and upgrade to ArcadeDB version 26.8.1 or later
• Restrict access to the /api/v1/server endpoint
• Monitor for suspicious database name activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional information on affected versions and remediation steps is limited. The vulnerability allows authenticated root users to write and delete arbitrary files outside the configured database directory. Evidence is based on CVE and NVD entries, with limitations noted in source information. Defenders should verify current version and exposure, and prioritize upgrading to version 26.8.1 or later.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.