High severity8.2NVD Advisory· Published Jul 23, 2026· Updated Sep 17, 2026
CVE-2026-63765
CVE-2026-63765
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.
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Affected products
1Patches
Vulnerability mechanics
References
5- github.com/chatwoot/chatwoot/commit/8dd0d08322edafaec24624b72ed2f6045921cb7bnvd
- github.com/chatwoot/chatwoot/issues/15072nvd
- github.com/chatwoot/chatwoot/pull/15039nvd
- github.com/chatwoot/chatwoot/releases/tag/v4.16.0nvd
- www.vulncheck.com/advisories/chatwoot-unauthenticated-activestorage-direct-upload-arbitrary-blob-creationnvd
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