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CriticalVulnerabilityCVE-2026-111594updated 25 Oct 2026, 17:05 UTC

InterSystems IRIS for Health sends data without encryption by default

By default, data sent to and from this health-data platform is not encrypted. Someone on the same network path could read it and potentially reuse login details to get into the system.

Official, 2 sources
SeverityCriticalCVSS 9.2 of 10
Being exploited?UnclearNo reports either way yet
Fix available?UnclearNo fixed version published in the sources yet
How sure is this?Official, 2 sourcesBacked by an official source

How the attack works simplified

  1. 1Traffic crosses networkData sent without encryption by default
  2. 2Attacker observes trafficCaptures transmitted data on the path
  3. 3Credentials reusedCaptured data used to log in
  4. 4Device accessedAttacker logs into the IRIS system
  5. ResultAttacker logs into the health data system

What happened

TLS/SSL encryption is disabled by default in InterSystems IRIS for Health, so transmitted data can be intercepted and used for authentication.

Why it is dangerous: Attackers who can observe network traffic could capture sensitive health records and credentials, enabling unauthorized access to the device.

Are you affected?

You are affected if you run InterSystems IRIS for Health with its default configuration, which leaves TLS/SSL turned off.

InterSystems IRIS for Health (versions not specified in the material)

What to do

  1. Check whether TLS/SSL is enabled in your IRIS for Health configuration and turn it on if it is not
  2. Review the GitHub advisory GHSA-qg7q-rhjp-mfxj and the vendor's guidance for the fixed version or mitigation
  3. Restrict network access to the IRIS for Health server so only trusted systems can reach it until encryption is enabled

Timeline

  1. 22 Oct 2026, 22:18 UTC
    Publicly disclosed
  2. 22 Oct 2026, 22:18 UTC
    Reported by NVD · NVD
  3. 25 Oct 2026, 17:05 UTC
    GitHub Advisory reported on it · GitHub Advisory

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-111594 · GHSA-qg7q-rhjp-mfxj
CVSS
9.2 / 10
EPSS
0.2% chance of exploitation within 30 days
Disclosed
22 Oct 2026, 22:18 UTC
On Zero Radar
before the radar started
Last change
25 Oct 2026, 17:05 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

InterSystems IRIS for Health sends data without encryption by default · Zero Radar