People in Canada who use the FreeStyle Libre 3 app should check an updated recall notice about app security and prolonged loss of communication with a sensor. Health Canada’s notice, published on 26 October 2026, advises affected users to update to version 3.6.10. Abbott’s updated patient letter is dated 23 October.
The important distinction is that this is an app update, not an instruction to discard a working sensor or stop diabetes treatment. The Canadian instructions also replace earlier advice about updating this app. Check the current notice for your own country, because app names and software versions are not identical everywhere.
Quick Answer: Which Version Is Affected?
The Canadian notice lists the FreeStyle Libre 3 app on Android and iOS, versions 3.6.4 through 3.6.8. Abbott’s updated letter directs affected users to a version whose full software number starts with 3.6.10. This article reports that Canadian action; it is not a worldwide instruction to install a particular country’s app.
Open the app’s menu, select About and read the full software version. Use Abbott’s country selector at LibreCheck to reach the appropriate current instructions. Do not assume that an old screenshot or a version number quoted for another country applies to your phone.
Why Was Another Update Needed?
Health Canada describes two connected problems. A security update intended to address a sensor-impersonation vulnerability introduced an unintended defect that could, in some circumstances, cause prolonged loss of communication between the app and sensor. Abbott says the newer update addresses both problems.
These are different risks. An app without sensor communication cannot provide the usual stream of glucose information. The security vulnerability, if exploited, could cause incorrect displayed readings or unreliable alerts. Neither description means that every user has experienced a fault or that a particular person’s app has been accessed.
In its Canadian FAQ, Abbott says that, as of 26 October, it was not aware of unauthorised access related to this vulnerability. That is a dated statement about what had been reported, not a guarantee that ignoring the update is safe.
Updating Without Waiting for a New Sensor
Abbott says affected Canadian users should update now rather than wait for their next sensor change. Its letter says updating does not interrupt the current sensor session or erase existing data, and no sensor replacement is required for this app action.
On Android, check available updates in Google Play under your profile and app-management controls. On iPhone, check app updates through your App Store profile. Then return to the app’s About screen to confirm the full version number. If the update is unavailable, the instructions do not match your app, or signal loss continues, contact Abbott rather than improvising a software or sensor workaround.
The Canadian patient letter lists Abbott Customer Care at 1-855-421-6177. People elsewhere should use their local Abbott contact details. No reader needs to enter a password or sensor identifier into this article.
If Readings Are Missing or Do Not Match Symptoms
Keep your agreed backup glucose-testing plan available. Abbott specifically advises checking with a finger-prick blood glucose meter when symptoms do not match the sensor reading or the reading seems inaccurate. Technical support can help with an app problem; your diabetes team should advise on clinical decisions when the usual monitoring information is unavailable.
Do not guess an insulin dose from an absent or doubtful reading. Do not stop prescribed insulin because an app is being updated. The NHS advises continuing insulin during illness even when not eating, following the individual sick-day plan. Our guide to FreeStyle Libre apps and alerts explains broader questions to discuss with your care team.
Symptoms Still Take Priority
An app update is not treatment for low glucose or diabetic ketoacidosis (DKA). Follow your established plan promptly for a low glucose result. If someone is unconscious, having a seizure or cannot swallow safely, call local emergency services immediately. Do not give food or drink by mouth when swallowing is unsafe. Use prescribed glucagon if available and you know how, without delaying emergency help.
Deep or difficult breathing, increasing drowsiness or confusion, repeated vomiting or suspected DKA require immediate emergency assessment. Call local emergency services or go to an emergency department; do not wait for the app to reconnect or for another sensor reading. Do not drive yourself when seriously unwell. High ketones require the urgent or emergency action specified in your clinical plan, not troubleshooting alone.
Does This Mean All Libre Products Are Recalled?
No. This Canadian software notice concerns the FreeStyle Libre 3 app and the specified versions. It does not establish that every Libre app, reader or sensor has the same problem. It is also separate from the Libre Duo glucose-and-ketone monitoring system.
The practical next step is to identify your exact app, country and full version, follow the current manufacturer notice, and retain reliable backup testing. A working screen should never outweigh symptoms that suggest an emergency.
Sources
- Health Canada: FreeStyle Libre 3 App, RA-82855, published 26 October 2026; recall date 16 October.
- Abbott: updated Canadian patient letter, ADC FA 1002-2026, 23 October 2026.
- Abbott: Canadian recall questions and answers.
- NHS: low blood sugar.
- NHS: diabetic ketoacidosis.
General education, not an individual treatment plan. Follow the current instructions for your exact product and country and seek clinical help when needed.