CVE-2026-56845 Path traversal in Rocket.Chat
Unauthenticated attackers can read arbitrary files via path traversal when CustomSounds storage is set to FileSystem.
- 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-2026-56845?
CVE-2026-56845 is a high-severity path traversal vulnerability in Rocket.Chat, published on 4 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An unauthenticated path traversal (LFI) vulnerability exists under /custom-sounds/ when CustomSounds storage is configured to FileSystem. By including ../ sequences in the request path, an attacker can read arbitrary files outside the base directory.
Weakness: CWE-22
Which versions are affected by CVE-2026-56845?
How do I fix CVE-2026-56845?
No fix has been published for CVE-2026-56845 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-2026-56845 being exploited?
There is no known exploitation of CVE-2026-56845 in the wild and no public exploit code.
Sources
Also known as GHSA-6c37-9jgq-mgm8.