# icalendar (PyPI) vulnerabilities

1 known vulnerability (1 high), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 7.3.0 (Aug 19, 2026): no advisory affects it
- Newest unaffected release: 7.3.0 (Aug 19, 2026), the latest release
- Weekly downloads: 2.4M
- Dependents: 777
- Releases: 89 since 1.1.0 (Nov 23, 2006)
- Registry: https://pypi.org/project/icalendar/
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-55099: 7.1.0 to 7.1.2 (7.1.3 is outside it)

## Advisories (1)

### [CVE-2026-55099](https://cve.now/CVE-2026-55099): icalendar: Algorithmic Complexity in Equality

- Severity: High 7.5
- Published: Aug 25, 2026
- Affected: from 7.1.0, fixed in 7.1.3.
- Fixed in 7.1.3 (released Jun 15, 2026, 71 days before disclosure).
- The latest release, 7.3.0, is not affected.

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