CVE-2026-46714Network attack vectorHinoki check available

Web-client crash via recursive theme references

Published Aug 3, 2026 · Updated Aug 3, 2026

Uncontrolled recursion in Misskey 8.63.0 through 2026.5.3 allows remote attackers to crash a web client via a malformed theme. The theme compiler follows recursive property references without cycle detection or a recursion bound, consuming browser resources until the client slows or terminates. A separate user must obtain and apply the crafted theme; the Misskey server remains available, and the reported consequence is limited to that user's browser session.

CVSS severity5.1
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Uncontrolled recursion in Misskey 8.63.0 through 2026.5.3 allows remote attackers to crash a web client via a malformed theme. The theme compiler follows recursive property references without cycle detection or a recursion bound, consuming browser resources until the client slows or terminates. A separate user must obtain and apply the crafted theme; the Misskey server remains available, and the reported consequence is limited to that user's browser session.

The record

CVE
CVE-2026-46714
Published
Aug 3, 2026
Updated
Aug 3, 2026
Vendor
Misskey Project
Product
Misskey
Classifications
CWE-674, CAPEC-231, CAPEC-230, T1499.004
Attack vector
network
Privileges
unauthenticated

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=>= 8.63.0, < 2026.5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Misskey Project · Misskeyversion=>= 8.63.0, < 2026.5.4

Published CVSS scores

5.1GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-674Uncontrolled Recursion
CAPEC-231Oversized Serialized Data Payloads
CAPEC-230Serialized Data with Nested Payloads
T1499.004Application or System Exploitation

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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