FreePBX ucp: critical vulnerability

FreePBX ucp

FreePBX is an open source IP PBX. Prior to 17.0.9, the UCP Node server on ports 8001 and 8003 uses io.use(checkAuth) in node/lib/server.js, but Socket.IO version 4 applies that middleware only to the default namespace.

Fix it

Upgrade to ucp 17.0.9

First seen: 10 Nov 2026
Last update: 10 Nov 2026, 15:17 UTC
Fixed in: 17.0.9
Identifiers: CVE-2026-73665
CVSS: 9.8
Source: news

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## FreePBX ucp: critical vulnerability
Severity: critical. Patch status: patched.
Affected: FreePBX ucp
Fixed in: 17.0.9
Ids: CVE-2026-73665

FreePBX is an open source IP PBX. Prior to 17.0.9, the UCP Node server on ports 8001 and 8003 uses io.use(checkAuth) in node/lib/server.js, but Socket.IO version 4 applies that middleware only to the default namespace.

## Steps
1. Search the repo, its CI and infra config for FreePBX ucp. If present, report the version in use and whether it's affected.
2. Fix by release line: ucp: older than 17.0.9 → 17.0.9.

## Fix by release line
| Line | State | Fix | Until then |
|---|---|---|---|
| ucp older than 17.0.9 | fixed | 17.0.9 | — |

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-73665") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://github.com/FreePBX/security-reporting/security/advisories/GHSA-37j8-fhxx-9vhp https://nvd.nist.gov/vuln/detail/CVE-2026-73665
https://pwned.coffee/i/freepbx-is-an-open-source-ip-pbx-cve-2026-73665

Timeline

10 Nov 2026, 15:18 UTC
Fix status: unknown → patched.
10 Nov 2026
First reported.

Receipt

Exploitation: No known exploitation
Fix by release line: Product Affected Fixed in Source
ucp < 17.0.9 17.0.9 GitHub advisory checked 10 Nov
Score: CVSS 9.8 (critical). CVSS 3.1 9.8 (NVD) for CVE-2026-73665
Last checked: 10 Nov 2026, 15:18 UTC

Product	Affected	Fixed in	Source
ucp	< 17.0.9	17.0.9	GitHub advisory checked 10 Nov

Sources: KEV – CVE record ✓ Vendor ✓

Sources

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