What’s Vulnerable › Vulnerabilities

CVE-2026-63768: cal.diy 6.2.0 Conferencing OAuth Callback Open Redirect via Unsigned State

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-20 · updated 2026-10-24
• Weakness: CWE-601

Description

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.

Affected products

• calcom cal.diy: through 6.2.0

References

• https://github.com/calcom/cal.diy/issues/29679
• https://github.com/calcom/cal.diy/pull/29681
• https://www.vulncheck.com/advisories/cal-diy-conferencing-oauth-callback-open-redirect-via-unsigned-state

Get alerted when CVE-2026-63768 or the next vulnerability affects your stack