CVE-2026-63765 Chatwoot < 4.16.0 Unauthenticated ActiveStorage Direct Upload Arbitrary Blob Creation
Unauthenticated attackers can bypass authentication to create arbitrary storage blobs in any tenant account via the direct uploads controller.
- 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-2026-63765?
CVE-2026-63765 is a high-severity authentication bypass vulnerability in chatwoot, published on 23 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Chatwoot before 4.16.0 contains an authentication bypass vulnerability in the direct uploads controller that allows unauthenticated attackers to create arbitrary ActiveStorage blobs in any tenant account. Attackers can exploit missing authentication checks to resolve any account and conversation, then obtain signed PUT URLs to write arbitrary data to the application's storage backend.
Weakness: CWE-306
Which versions are affected by CVE-2026-63765?
How do I fix CVE-2026-63765?
No fix has been published for CVE-2026-63765 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-63765 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-63765 exists.
Sources
Also known as GHSA-9wjj-m9cm-hjjc.