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CVE-2026-63768

cal.diy 6.2.0 Conferencing OAuth Callback Open Redirect via Unsigned State

CVSS 4.0 5.3 MEDIUMCVSS 3.1 4.3 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-63768

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-63768

Published

cal.diy

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "calcom",
                    "product": "cal.diy",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:github/calcom/cal.diy",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThanOrEqual": "6.2.0"
                        }
                    ],
                    "repo": "https://github.com/calcom/cal.diy"
                }

Original source record · Cite this exact observation · Complete original publisher JSON