CVE-2022-46405

Name: CVE-2022-46405
Creator: NVD / NIST
Published: 2022-12-04T04:15:09.38+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.92%

Last modified Jun 17, 2026

CVE-2022-46405 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Mastodon through 4.0.2 allows attackers to cause a denial of service (large Sidekiq pull queue) by creating bot accounts that follow attacker-controlled accounts on certain other servers associated with a wildcard DNS A record, such that there is uncontrolled recursion of attacker-generated messages.. EPSS estimates a 0.92% chance of exploitation in the next 30 days.

Description

Mastodon through 4.0.2 allows attackers to cause a denial of service (large Sidekiq pull queue) by creating bot accounts that follow attacker-controlled accounts on certain other servers associated with a wildcard DNS A record, such that there is uncontrolled recursion of attacker-generated messages.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.92%

55.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Joinmastodon	Mastodon	<= 4.0.2

References

https://borg.social/notes/98bcoo2t1nIssue Tracking, Third Party Advisory
https://hackmd.io/rD9nsTz1QeuPT-erxqjY-AExploit, Issue Tracking, Third Party Advisory
https://borg.social/notes/98bcoo2t1nIssue Tracking, Third Party Advisory
https://hackmd.io/rD9nsTz1QeuPT-erxqjY-AExploit, Issue Tracking, Third Party Advisory

Timeline

Published: Dec 4, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-46405?

How severe is CVE-2022-46405?

CVE-2022-46405 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.92% probability of exploitation in the next 30 days.

How do I fix CVE-2022-46405?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-46405?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST