PT-2026-61691 · Cal.Com · Cal.Diy

George Chen · CVE-2026-63768 · Published 2026-07-20 · Updated 2026-07-20

NVD

CVSS v3.1

4.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

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.

Exploit

Fix

Open Redirect

Weakness Enumeration

CWE-601

Related Identifiers

CVE-2026-63768

Affected Products

Cal.Diy

References · 4

• 🔥 https://github.com/calcom/cal.diy/issues/29679 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-63768 · Security Note
• https://github.com/calcom/cal.diy/pull/29681 · Note
• https://vulncheck.com/advisories/cal-diy-conferencing-oauth-callback-open-redirect-via-unsigned-state · Note