CVE-2026-113874 SmileCDR CVE debrief

Who should care

Defenders responsible for HAPI FHIR deployments, particularly those with multi-tenant environments, should assess exposure and verify access controls. This includes reviewing authentication mechanisms, monitoring for suspicious activity, and implementing compensating controls where necessary. The vulnerability poses a significant risk to organizations with HAPI FHIR deployments, and prompt action is necessary to mitigate potential damage.

Why it matters

CVE-2026-113874 allows an attacker to access data from another tenant's partition, highlighting the need for defenders to verify access controls and authentication mechanisms.

• An attacker authorized for one tenant can read from or write to another tenant's partition
• Defenders must verify and enforce storage partition entitlement for HAPI FHIR tenants
• Remediation priority is high due to potential for unauthorized data access

Technical summary

SmileCDR HAPI FHIR allows an untrusted bundle body to replace a partition identity previously established by a trusted source, and does not enforce storage partition entitlement by default. This vulnerability allows an attacker authorized for one tenant to read from or write to another tenant's partition, highlighting the need for defenders to verify access controls and authentication mechanisms. The vulnerability is particularly concerning in multi-tenant environments, where an attacker may exploit this to access unauthorized data.

Defensive priority

Defenders should prioritize verifying and enforcing storage partition entitlement for HAPI FHIR tenants, reviewing access controls and authentication mechanisms.

Recommended defensive actions

• Verify and enforce storage partition entitlement for HAPI FHIR tenants
• Review access controls and authentication mechanisms
• Monitor for suspicious activity and implement compensating controls
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• 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

Evidence notes

The CVE record and source item provide details on the vulnerability, but limited information is available on affected versions and remediation. Defenders should verify and enforce storage partition entitlement for HAPI FHIR tenants, review access controls and authentication mechanisms, and monitor for suspicious activity. The CVE Program record and NIST NVD detail page offer additional context, but further investigation is required to understand the full scope of the vulnerability.

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.