Vulnerability · Published Aug 3, 2026 · Assigned by GitHub_M
CVE-2026-46714Misskey: Denial of Service via Uncontrolled Recursion in Theme Compilation
Medium 5.1
In plain English
A medium-severity security flaw in misskey from misskey-dev. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities).
Severity (CVSS 4.0)5.1Medium
Exploit odds (30 days)0.4%top 61.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| misskey-dev | misskey | >= 8.63.0, < 2026.5.4 |
Weakness: CWE-674 · 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
References
- https://github.com/misskey-dev/misskey/security/advisories/GHSA-wmhf-m93m-rgmj x_refsource_CONFIRM
- https://github.com/misskey-dev/misskey/releases/tag/2026.5.4 x_refsource_MISC