CVE-2021-47942 Home Assistant Community Store 1.10.0 Path Traversal Account Takeover
Unauthenticated attackers can read sensitive auth files via path traversal to craft JWT tokens and gain administrative access to Home Assistant instances.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-47942?
CVE-2021-47942 is a high-severity path traversal vulnerability in Home-Assistant Home Assistant Community Store (HACS), published on 16 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-22
Which versions are affected by CVE-2021-47942?
It affects 1 product.
Products include Hacs Home Assistant Community Store.
How do I fix CVE-2021-47942?
No fix has been published for CVE-2021-47942 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2021-47942 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47942 exists.
Sources
Also known as GHSA-cqg8-v99m-gv9m.