Web Client Vulnerability in Misskey Open Source Social Media Platform
CVE-2026-46714

5.1MEDIUM

Key Information:

Vendor

Misskey-dev

Status
Misskey
Vendor
CVE Published:
3 August 2026

What is CVE-2026-46714?

Misskey, an open-source federated social media platform, contains a vulnerability that can lead to significant performance degradation or crash of the web client when a malformed theme is applied. This flaw affects versions from 8.63.0 up to, but not including, 2026.5.4. To mitigate this issue, users are encouraged to update to version 2026.5.4, where the problem has been addressed.

Affected Version(s)

misskey >= 8.63.0, < 2026.5.4

References

https://github.com/misskey-dev/misskey/security/advisorie...
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https://github.com/misskey-dev/misskey/releases/tag/2026.5.4
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CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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