CVE-2026-63765
Chatwoot < 4.16.0 Unauthenticated ActiveStorage Direct Upload Arbitrary Blob Creation
CVSS 4.0 8.8 HIGHCVSS 3.1 8.2 HIGHCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-63765
PublishedChatwoot 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.
Read the publisher's advisoryAffected versions, risk and source history
Related advisories and sources
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CVE-2026-63765 · CVE overview and exploitation status
cve-program · CVE-2026-63765
- https://github.com/chatwoot/chatwoot/issues/15072
- https://github.com/chatwoot/chatwoot/releases/tag/v4.16.0
- https://github.com/chatwoot/chatwoot/pull/15039
- https://github.com/chatwoot/chatwoot/commit/8dd0d08322edafaec24624b72ed2f6045921cb7b
- https://www.vulncheck.com/advisories/chatwoot-unauthenticated-activestorage-direct-upload-arbitrary-blob-creation
Related changes
Linked by CVE identifierNo related changes are available here.