Misskey is an open source, federated social media platform. IVersions 8.63.0 and later, but prior to 2026.5.4, contain a vulnerability that can cause the Misskey web client to slow down or crash when it applies a malformed theme. This issue has been fixed in version 2026.5.4.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Active

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact Low

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

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References
Link Providers
https://github.com/misskey-dev/misskey/releases/tag/2026.5.4 cve-icon
https://github.com/misskey-dev/misskey/security/advisories/GHSA-wmhf-m93m-rgmj cve-icon
History

Mon, 03 Aug 2026 22:15:00 +0000

Type Values Removed Values Added
Description Misskey is an open source, federated social media platform. IVersions 8.63.0 and later, but prior to 2026.5.4, contain a vulnerability that can cause the Misskey web client to slow down or crash when it applies a malformed theme. This issue has been fixed in version 2026.5.4.
Title Misskey: Denial of Service via Uncontrolled Recursion in Theme Compilation
Weaknesses CWE-674
References
Metrics cvssV4_0

{'score': 5.1, 'vector': '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'}
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-08-03T21:58:36.825Z

Updated: 2026-08-03T21:58:36.825Z

Reserved: 2026-05-15T23:26:58.309Z

Link: CVE-2026-46714

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

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