CVE-2026-19416Network attack vectorHinoki check available

Cross-patient appointment modification via IDOR

Published Aug 19, 2026 · Updated Aug 19, 2026

Improper access control in KiviCare before 4.5.4 allows remote authenticated users to modify other patients' appointments via IDOR. The appointment modification path accepts an appointment identifier from the request but does not verify that the current patient owns that record before processing cancellation or rescheduling. Patient-level access is sufficient, and the documented impact is unauthorized appointment changes rather than broader account takeover or code execution.

CVSS severity4.3
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper access control in KiviCare before 4.5.4 allows remote authenticated users to modify other patients' appointments via IDOR. The appointment modification path accepts an appointment identifier from the request but does not verify that the current patient owns that record before processing cancellation or rescheduling. Patient-level access is sufficient, and the documented impact is unauthorized appointment changes rather than broader account takeover or code execution.

The record

CVE
CVE-2026-19416
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
Iqonic Design
Product
KiviCare
Classifications
CWE-639, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <4.5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Iqonic Design · KiviCareversion=0 <4.5.4

Published CVSS scores

4.3GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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