cal.com vulnerabilities and fixes

Recent CVEs affecting cal.com, with upgrade or downgrade steps. 2 tracked.

Also searched as: cal com, calcom.

cal.com has 2 tracked vulnerabilities, 2 critical. A fixed release or vendor patch exists for 2. Most recent: 2026-01-13. Highest priority: CVE-2025-66489 (score 60/100).

• CVE-2025-66489 CRITICAL 9.8 UPGRADE Cal.com is open-source scheduling software
• CVE-2026-23478 CRITICAL 9.8 UPGRADE Cal.com is open-source scheduling software

FAQ

How do I fix cal.com vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is cal.com being exploited right now?

None of the tracked cal.com CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which cal.com CVE should I patch first?

CVE-2025-66489 currently ranks highest (60/100): Cal.com is open-source scheduling software.

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