CVE-2018-21018

CRITICAL 9.8CVE-2018-21018 · Published 22/09/2019 · updated 17/06/2026

In short

CVE-2018-21018 is a CRITICAL (CVSS 9.8) vulnerability affecting mastodon (joinmastodon).
Chance of exploitation in the next 30 days (EPSS): 2.6%, higher than 85.1% of all vulnerabilities.
Fix: update to 2.6.3 or later.

Package	Affected versions	Patched versions
mastodon joinmastodon	`< 2.6.3`	`2.6.3`

Mastodon before 2.6.3 mishandles timeouts of incompletely established sessions.

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Package

Affected versions

Patched versions

< 2.6.3

2.6.3

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