CVE-2018-21018

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

Mastodon before 2.6.3 mishandles timeouts of incompletely established sessions.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-613

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/tootsuite/mastodon/pull/9329Patch, Third Party Advisory
https://github.com/tootsuite/mastodon/pull/9381Patch, Third Party Advisory
https://github.com/tootsuite/mastodon/releases/tag/v2.6.2Release Notes, Third Party Advisory
https://github.com/tootsuite/mastodon/releases/tag/v2.6.3Release Notes, Third Party Advisory
https://github.com/tootsuite/mastodon/pull/9329Patch, Third Party Advisory
https://github.com/tootsuite/mastodon/pull/9381Patch, Third Party Advisory
https://github.com/tootsuite/mastodon/releases/tag/v2.6.2Release Notes, Third Party Advisory
https://github.com/tootsuite/mastodon/releases/tag/v2.6.3Release Notes, Third Party Advisory

Timeline

Published: Sep 22, 2019
Last modified: Jun 17, 2026
NVD status: Modified

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