CVE-2026-104817: misskey >= 12.0.0, <= 13.14.2, >= 2023.9.0-beta.1, < 2026.7.0

Affected technology

misskey · >= 12.0.0, <= 13.14.2, >= 2023.9.0-beta.1, < 2026.7.0
misskey-dev

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

An attacker can trigger unbounded outbound HTTP requests and synchronous parsing, exhausting instance resources, amplifying requests toward third-party servers, or probing network-reachable services even when federation is disabled. Vendor/CNA’s CVSS 4.0 assessment (base score 8.7/10) rates confidentiality and integrity impact as none; availability impact as high.