# CVE-2026-120425: Chatify before 1.6.4 Pusher Authorization Bypass via /chat/auth Endpoint

Status: published. Published: 2026-11-02. Updated: 2026-11-02.

Chatify before 1.6.4 contains an authorization bypass vulnerability in the Pusher channel authorization endpoint that allows authenticated users to subscribe to other users' private channels by supplying arbitrary channel names. Attackers can request a signature for private-chatify.<victim id> via POST /chat/auth to receive the victim's incoming private messages and attachments in real time.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/munafio/chatify/commit/e16bdb197d227aa2a66863c166bbb31c5f45bc2a

## Affected products and versions

- munafio / Chatify (munafio/chatify): ≥ 0; < 1.6.4 (affected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 7.1 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N; source: CNA: VulnCheck

- CVSS 4.0: 7.1 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation poc; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-639

## Exploit evidence

- exploit: https://hackmd.io/@hieund/cve-2026-120425-chatify-pusher-channel-authorization-bypass (ADP: CISA-ADP)

## References

- https://github.com/munafio/chatify/issues/412 (CNA: VulnCheck; issue-tracking)

- https://github.com/munafio/chatify/commit/e16bdb197d227aa2a66863c166bbb31c5f45bc2a (CNA: VulnCheck; patch)

- https://github.com/munafio/chatify/releases/tag/v1.6.4 (CNA: VulnCheck; release-notes)

- https://github.com/munafio/chatify/blob/v1.6.3/src/ChatifyMessenger.php#L101-L124 (CNA: VulnCheck; technical-description)

- https://hackmd.io/@hieund/chatify-pusher-channel-authorization-bypass (CNA: VulnCheck; technical-description)

- https://www.vulncheck.com/advisories/chatify-before-1.6.4-pusher-authorization-bypass-via-chat-auth-endpoint (CNA: VulnCheck; third-party-advisory)

- https://hackmd.io/@hieund/cve-2026-120425-chatify-pusher-channel-authorization-bypass (ADP: CISA-ADP; exploit)

- https://github.com/munafio/chatify/blob/v1.6.3/src/ChatifyMessenger.php#L101-L124 (disclosure@vulncheck.com)

- https://github.com/munafio/chatify/commit/e16bdb197d227aa2a66863c166bbb31c5f45bc2a (disclosure@vulncheck.com)

- https://github.com/munafio/chatify/issues/412 (disclosure@vulncheck.com)

- https://github.com/munafio/chatify/releases/tag/v1.6.4 (disclosure@vulncheck.com)

- https://hackmd.io/@hieund/chatify-pusher-channel-authorization-bypass (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/chatify-before-1.6.4-pusher-authorization-bypass-via-chat-auth-endpoint (disclosure@vulncheck.com)

- https://hackmd.io/@hieund/cve-2026-120425-chatify-pusher-channel-authorization-bypass (134c704f-9b21-4f2e-91b3-4a467353bcc0)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-120425; retrieved 2026-11-02; source updated 2026-11-02

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-120425; retrieved 2026-11-02; source updated 2026-11-02

Revision: ecff17ad2675e47de567dd1a23463cb2464faf18db878425bae9cb3561284183

Canonical: https://y2.dev/cve/CVE-2026-120425

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