CVE-2026-76223 ArcadeData CVE debrief

Who should care

Defenders responsible for managing and securing ArcadeDB installations should be aware of this vulnerability and take steps to verify and mitigate it. This includes reviewing and updating database function libraries, restricting database access to trusted users, and monitoring for suspicious activity. Additionally, defenders should prioritize verifying and upgrading to ArcadeDB version 26.8.1 or later to prevent potential tampering with admin-defined logic

Why it matters

Defenders should prioritize verifying and upgrading to ArcadeDB version 26.8.1 or later to prevent potential tampering with admin-defined function logic. This vulnerability could allow a user with database access to add or overwrite SQL or Cypher functions in an existing library, enabling unauthorized changes to database operations.

• Tampering with admin-defined function logic could lead to unauthorized changes to database operations.
• A user with database access could exploit this vulnerability to gain additional privileges.
• The vulnerability could be used to manipulate data or disrupt database functionality.

Technical summary

ArcadeDB versions 26.7.3 and earlier fail to enforce the UPDATE_SCHEMA permission check when a DEFINE FUNCTION statement targets an already-existing function library. A user with only database access can add or overwrite SQL or Cypher functions in an existing library and persist the change, enabling tampering with admin-defined function logic. This issue allows unauthorized changes to database operations, potentially leading to data manipulation or disruption of database functionality. The vulnerability is fixed in version 26.8.1.

Defensive priority

Defenders should prioritize verifying and upgrading to ArcadeDB version 26.8.1 or later to prevent potential tampering with admin-defined function logic.

Recommended defensive actions

• Verify the current version of ArcadeDB and upgrade to version 26.8.1 or later if necessary.
• Restrict database access to trusted users and monitor for suspicious activity.
• Review and update database function libraries to ensure they have not been tampered with.
• 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.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, its impact, and the fixed version. However, additional information from the vendor and other sources may be necessary to fully understand the issue and its implications.

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.