CVE-2026-63765
High
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.
SeverityHigh
CVSS8.2
Exploit probability—
Product
Chatwoot
PublishedJul 23, 2026
First seenJul 23, 2026
Weakness typeCWE-306Missing authentication for critical function
How to fix
Update
- chatwoot chatwoot4.16.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| chatwoot chatwoot | v < 4.16.0 | 4.16.0 |
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