CVE-2026-54447: Cyberjunky Python-Garminconnect

High severity, CVSS 8.4. EPSS: 0.2% chance of exploitation in the next 30 days.

garminconnect is a Python 3 API wrapper for Garmin Connect that retrieves statistics and manages activities. Prior to 0.3.5, garminconnect/client.py Client.dump creates the OAuth token directory and garmin_tokens.json without explicit owner-only modes, so a permissive umask such as 022 can leave the directory mode at 0755 and the token file mode at 0644. garmin_tokens.json contains di_refresh_token, and another unprivileged user on a shared Linux or macOS host can read the token and obtain persistent access to the victim's Garmin Connect account, including health, fitness, activity, and device data. The Garmin.login tokenstore path is affected, and a pre-existing loosely permissioned token file remains exposed until rewritten or manually restricted. This issue is fixed in version 0.3.5.

Affected products

• Cyberjunky Python-Garminconnect: before 0.3.5 (fixed in 0.3.5)

Published 2026-09-14. Last modified 2026-09-30.