CVE-2026-71283: Fledge IoT Gateway Backup Restore Tar Path Traversal

Severity: medium (CVSS 4.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-05 · updated 2026-10-23
Weakness: CWE-22

Description

Fledge's backup-restore upload handler, upload_backup (python/fledge/services/core/api/backup_restore.py), calls tarfile.extractall(temp_path) on an admin-uploaded tar archive with no filter argument and no per-member path validation. Requires the admin role (@has_permission("admin")).

Affected products

fledge-iot fledge: through 3.1.0

References

https://github.com/fledge-iot/fledge
https://github.com/fledge-iot/fledge/blob/main/python/fledge/services/core/api/backup_restore.py

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