CVE-2026-46712Network attack vectorHinoki check available

Authenticated Direct Message disclosure via missing permission checks

Published Aug 3, 2026 · Updated Aug 3, 2026

Authorization bypass in Misskey 2025.3.2 through 2026.5.3 allows remote authenticated users to read limited Direct Message data. The Direct Messaging API endpoint returns message-related data without enforcing the requesting account's permission to access it. A low-privileged account is required; federation state does not change exposure, and specified-visibility notes are excluded.

CVSS severity2.3
Low
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authorization bypass in Misskey 2025.3.2 through 2026.5.3 allows remote authenticated users to read limited Direct Message data. The Direct Messaging API endpoint returns message-related data without enforcing the requesting account's permission to access it. A low-privileged account is required; federation state does not change exposure, and specified-visibility notes are excluded.

The record

CVE
CVE-2026-46712
Published
Aug 3, 2026
Updated
Aug 3, 2026
Vendor
Misskey Project
Product
Misskey
Classifications
CWE-639, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2025.3.2, < 2026.5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Misskey Project · Misskeyversion=>= 2025.3.2, < 2026.5.4

Published CVSS scores

2.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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