PT-2026-64147 · Chatwoot · Chatwoot

George Chen · CVE-2026-63765 · Published 2026-07-23 · Updated 2026-07-23

NVD

CVSS v3.1

8.2

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

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.

Exploit

Fix

Missing Authentication

Weakness Enumeration

CWE-306

Related Identifiers

CVE-2026-63765

Affected Products

Chatwoot

References · 6

• 🔥 https://github.com/chatwoot/chatwoot/issues/15072 · Exploit
• https://github.com/chatwoot/chatwoot/commit/8dd0d08322edafaec24624b72ed2f6045921cb7b · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-63765 · Security Note
• https://github.com/chatwoot/chatwoot/releases/tag/v4.16.0 · Note
• https://github.com/chatwoot/chatwoot/pull/15039 · Note
• https://vulncheck.com/advisories/chatwoot-unauthenticated-activestorage-direct-upload-arbitrary-blob-creation · Note