---
id: CVE-2026-63768
title: >-
  cal.diy through 6.2.0 contains an open redirect vulnerability in the
  conferencing OAuth callback endpoint that allows attackers to redirect users
  to arbitrary URLs by crafting malicious state parameters
summary: >-
  cal.diy through 6.2.0 contains an open redirect vulnerability in the
  conferencing OAuth callback endpoint that allows attackers to redirect users
  to arbitrary URLs by crafting malicious state parameters. Attackers can
  exploit the unsigne…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'
cwe:
  - CWE-601
vendor: calcom
product: cal.diy
affected:
  - cal.diy <= 6.2.0
published: '2026-07-20'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T18:16:58.460'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63768'
references:
  - url: 'https://github.com/calcom/cal.diy/issues/29679'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/calcom/cal.diy/pull/29681'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/cal-diy-conferencing-oauth-callback-open-redirect-via-unsigned-state
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-07-20T19:27:56.880013Z'
epss: 0.00342
epssPercentile: 0.25071
ingestedAt: '2026-09-17T18:25:15.978Z'
---

## Overview

cal.diy through 6.2.0 contains an open redirect vulnerability in the conferencing OAuth callback endpoint that allows attackers to redirect users to arbitrary URLs by crafting malicious state parameters. Attackers can exploit the unsigned state parameter and onErrorReturnTo field to silently redirect visitors from the trusted domain to attacker-controlled URLs for phishing attacks.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.