{
  "cveId": "CVE-2026-77399",
  "url": "https://patchblox.com/security/cve/CVE-2026-77399",
  "summary": "CVE-2026-77399 is fixed in python-icalendar on 1 platform by DEBIAN-CVE-2026-77399 (version 7.3.0-1), released October 9, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "python-icalendar: icalendar is an RFC 5545 compatible parser and generator of iCalendar files for Python",
  "description": "icalendar is an RFC 5545 compatible parser and generator of iCalendar files for Python. From 6.1.0 until 7.2.2, vInt.from_ical accepts an attacker-controlled VALARM REPEAT value and applications that request alarm times can eagerly expand it without an application-level limit. Alarms.times and Alarms.active reach the unbounded expansion in versions starting with 6.1.0, while Alarm.triggers adds a second affected path starting with 7.0.0. Parsing alone does not trigger the issue, but accessing these properties can consume excessive CPU time and heap memory and terminate or stall a service. This issue is fixed in version 7.2.2.",
  "published": "2026-09-22T19:16:51Z",
  "severity": "medium",
  "cvss": 6.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00312,
  "epssPercentile": 0.24211,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "python-icalendar",
      "release": "Debian 14",
      "fixedVersion": "7.3.0-1",
      "fix": "DEBIAN-CVE-2026-77399",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-77399",
      "released": "2026-10-09T22:35:45Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}