What is CVE-2026-63765?

CVE-2026-63765 is a high-severity vulnerability in Chatwoot, classified under Missing Authentication for Critical Function. CVSS score: 8.2/10. Published 2026-07-23.

How severe is CVE-2026-63765?

High severity. CVSS v3 base score is 8.2 out of 10.

Auth bypass in Chatwoot

CVE-2026-63765

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 auth…

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L.

Affected products

Chatwoot — versions 0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-63765?: CVE-2026-63765 is a high-severity vulnerability in Chatwoot, classified under Missing Authentication for Critical Function. CVSS score: 8.2/10. Published 2026-07-23.
How severe is CVE-2026-63765?: High severity. CVSS v3 base score is 8.2 out of 10.