PatchTheCVEicalendar vulnerabilities and fixes
Recent CVEs affecting icalendar, with upgrade or downgrade steps. 1 tracked.
icalendar has 1 tracked vulnerability, 0 critical. A fixed release or vendor patch exists for 1. Most recent: 2026-03-26. Highest priority: CVE-2026-33635 (score 24/100).
- CVE-2026-33635 MEDIUM 4.3 UPGRADE iCalendar is a Ruby library for dealing with iCalendar files in the iCalendar format defined by RFC-5545
FAQ
How do I fix icalendar 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 icalendar being exploited right now?
None of the tracked icalendar CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which icalendar CVE should I patch first?
CVE-2026-33635 currently ranks highest (24/100): iCalendar is a Ruby library for dealing with iCalendar files in the iCalendar format defined by RFC-5545.