Public proof of conceptFix available

CVE-2022-46405

Q: Is CVE-2022-46405 actively exploited?

A proof-of-concept exploit exists for CVE-2022-46405, but active exploitation has not been confirmed at this time.

Q: What is the CVSS score for CVE-2022-46405?

CVE-2022-46405 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

A public proof of concept exists; no exploitation attested.

Published2022-12-04
WeaknessCWE-674

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2022-12-0404:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-46405?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-46405?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Joinmastodon mastodon

Branch	Affected	Fixed in	Source
4.0	≤ 4.0.2	no fix published	NVD

mastodon

Branch	Affected	Fixed in	Source
4.0	< 4.0.3	4.0.3	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionpoc2025-04-24
OpenCVESSVC decisionpoc—
CISA-ADPCVSS 3.17.52025-04-24
NVDCVSS 3.17.5read 2026-10-23
CISA-ADPweakness (CWE)CWE-6742025-04-24
NVDweakness (CWE)CWE-674read 2026-10-23
FIRST EPSSEPSS score1.0 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2022-12-04
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2022-46405?

Is CVE-2022-46405 actively exploited?

A proof-of-concept exploit exists for CVE-2022-46405, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2022-46405?

CVE-2022-46405 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

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