pypi package report

Is icalendar safe?

1 known vulnerability, worst severity HIGH.

cvss
7.5

how bad it is if exploited, out of 10

epss
0.40%

chance of exploitation in the next 30 days

xyz score
4.1

CyberXYZ composite, out of 10

fig. 01 — GHSA-cv84-9p8j-fj68, the advisory selected below

// advisories

GHSA-cv84-9p8j-fj68

HIGHCVE-2026-55099

Component.eq compares subcomponents in O(2^n) time relative to nesting depth. Because the parser accepts arbitrarily nested components, a sub-kilobyte .ics file is enough to make a single equality check run for minutes or hang indefinitely. Any application that compares parsed components (==, !=, in, set/dict membership, deduplication, test assertions) against attacker-supplied calendar data is ex

Affected
>= 7.1.0, < 7.1.3
Fixed in
7.1.3
Weakness
CWE-400
Published
2026-08-25
Source
github

GHSANVDMITREreferencereferencereferencereference

// dependencies

3 direct

Sign in for dependency paths and remediation

// ai model usage

No published models are known to use this package.

Checked 2026-09-22 at 00:45 UTC. The most recent advisory here was published 2026-08-25. Updated continuously from NVD, GHSA, OSV and CNA feeds.

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Is icalendar safe? pypi package security report | CyberXYZ