PT-2026-67527 · Misskey Dev · Misskey

CVE-2026-48115 · Published 2026-08-03 · Updated 2026-08-03

NVD

CVSS v4.0

6.3

Medium

Base vector

AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Misskey is an open source, federated social media platform. All Misskey servers running versions 2024.5.0 and later, but prior to 2026.5.4, contain a vulnerability in the Server Announcements API where insufficient permission checks allow attackers to access limited portions of data that they normally couldn't view. This vulnerability occurs whether or not federation is enabled. This issue has been fixed in version 2026.5.4.

Fix

Improper Authorization

Weakness Enumeration

CWE-285

Related Identifiers

CVE-2026-48115

Affected Products

Misskey

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-48115 · Security Note
• https://github.com/misskey-dev/misskey/releases/tag/2026.5.4 · Note
• https://github.com/misskey-dev/misskey/security/advisories/GHSA-j49q-76hx-mv8f · Note