Reference page — cumulative record through Monday, October 5, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-63765
Chatwoot < 4.16.0 Unauthenticated ActiveStorage Direct Upload Arbitrary Blob Creation
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV
N L N N N N H L 8.8 .0070 51.6 —
AFFECTED
Product Versions Fixed
chatwoot unspecified —
TIMELINE
Jul 18 Reserved by VulnCheck
Jul 23 Published (CNA: VulnCheck)
Jul 24 EXPLOIT PUBLISHED — CVE-2026-63765 (chatwoot). Public exploit reference added.
Sep 17 EXPLOIT PUBLISHED — CVE-2026-63765 (chatwoot). Public exploit reference added.
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.
Lifecycle
Complete event history — 4 events, chronological
| Date | Event | Detail |
|---|
| July 18, 2026 | Reserved | Reserved by VulnCheck |
| July 23, 2026 | Published | Published (CNA: VulnCheck) |
| July 24, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-63765 (chatwoot). Public exploit reference added. |
| September 17, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-63765 (chatwoot). Public exploit reference added. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| chatwoot | chatwoot | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-63765 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 5, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
