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CVE-2026-46714— Misskey: Denial of Service via Uncontrolled Recursion in Theme Compilation

Quick assessment

Affected
misskey-dev misskey
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

misskey-dev misskey是misskey-dev公司的一个去中心化的社交网络服务器软件。 misskey-dev misskey 8.63.0版本至2026.5.4之前版本存在资源管理错误漏洞，该漏洞源于应用畸形主题时处理不当，可能导致Web客户端变慢或崩溃。

CVSS 5.1 · Medium EPSS 0.45% · P36

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
misskey-dev misskey >= 8.63.0, < 2026.5.4 affected
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I. Basic Information for CVE-2026-46714

Vulnerability Information
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Vulnerability Title
Misskey: Denial of Service via Uncontrolled Recursion in Theme Compilation
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
Source: CVE Program / CVE List V5
Vulnerability Title
misskey-dev misskey 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
misskey-dev misskey是misskey-dev公司的一个去中心化的社交网络服务器软件。 misskey-dev misskey 8.63.0版本至2026.5.4之前版本存在资源管理错误漏洞，该漏洞源于应用畸形主题时处理不当，可能导致Web客户端变慢或崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
misskey-dev misskey >= 8.63.0, < 2026.5.4 -

II. Public POCs for CVE-2026-46714

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III. Intelligence Information for CVE-2026-46714

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Vendor Advisories for CVE-2026-46714 (1)

Vendor Pages for CVE-2026-46714 (1)

Same Patch Batch · misskey-dev · 2026-08-03 · 5 CVEs total

CVE-2026-46713 9.2 CRITICAL Misskey: JSON-LD signature validation + compaction may lead to improper activity handling
CVE-2026-47746 8.9 HIGH Misskey: JSON-LD signature validation + compaction is vulnerable to timing attacks
CVE-2026-48115 6.3 MEDIUM Misskey: Improper Authorization in the Announcements API
CVE-2026-46712 2.3 LOW Misskey: Lack of proper permission checks in Direct Messaging feature

IV. Related Vulnerabilities

Same product: misskey
Same vendor: misskey-dev
Same weakness: CWE-674

V. Comments for CVE-2026-46714

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