Incomplete cleanup in Misskey - CVE-2026-103937
Published: August 25, 2026 / Updated: October 16, 2026
Vulnerability identifier: #VU145004
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-103937
CWE-ID: CWE-459
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient cleanup processing during file uploads. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
Affected software
Misskey
How to mitigate CVE-2026-103937
Install updates from vendor's website.
Misskey - update to 2026.7.0