Input validation error in Misskey - CVE-2024-52590
Published: December 18, 2024 / Updated: April 28, 2026
Vulnerability identifier: #VU128331
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2024-52590
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Misskey Development Division
Affected software:
Misskey
Misskey
Detailed vulnerability description
The vulnerability allows a remote attacker to impersonate users on another instance.
The vulnerability exists due to improper input validation in ApRequestService.signedGet when validating signed profile requests. A remote attacker can create a spoofed user profile to impersonate users on another instance.
The spoofed profile may appear to originate from a different instance than the one where it actually exists, and the attacker has full control over that spoofed account.
How to mitigate CVE-2024-52590
Install security update from vendor's website.