CVE-2026-75850 ArcadeData CVE debrief

Who should care

Defenders and administrators of ArcadeDB deployments that use per-type or per-group ACLs, especially those with users having limited permissions, should assess exposure and prioritize remediation.

Why it matters

CVE-2026-75850 allows users with limited permissions to access and modify unauthorized data in ArcadeDB deployments using per-type or per-group ACLs, requiring verification and remediation.

• Potential unauthorized data access and modification
• Bypass of per-type and per-group ACLs
• Increased risk for users with limited permissions
• Verification of remediation and compensating controls required

Technical summary

ArcadeDB before 26.8.1 fails to bind authenticated principals on batch and time-series HTTP handlers, allowing users with limited per-type permissions to read and write to unauthorized types by submitting requests to these endpoints. This vulnerability affects deployments using per-type or per-group ACLs, particularly those with users having limited permissions. The vulnerability's technical framing indicates a need for defenders to verify and remediate this vulnerability in affected deployments, focusing on per-type and per-group ACLs.

Defensive priority

Defenders should prioritize verifying and remediating this vulnerability in ArcadeDB deployments that use per-type or per-group ACLs, especially those with users having limited permissions.

Recommended defensive actions

• Verify ArcadeDB version and check for updates to 26.8.1 or later
• Review and adjust per-type and per-group ACLs to minimize potential impact
• Monitor batch and time-series HTTP handlers for suspicious activity
• Consider compensating controls for deployments with limited permissions
• Review 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 its exploitation and impact require further verification from official sources. The vulnerability's scope and severity indicate a need for defenders to verify ArcadeDB versions, review and adjust ACLs, and monitor for suspicious activity. Official sources suggest that deployments using per-type or per-group ACLs are at risk, and users with limited permissions may be able to access and modify unauthorized data.

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.