CVE-2026-48115

MEDIUM

Misskey: Improper Authorization in the Announcements API

Title source: cna
STIX 2.1

Description

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.

References (2)

Core 2
Core References

Scores

CVSS v4 6.3
EPSS 0.0025
EPSS Percentile 16.4%
CVSS:4.0/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

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-285
Status published
Products (1)
misskey-dev/misskey >= 2024.5.0, < 2026.5.4
Published Aug 03, 2026
Tracked Since Aug 04, 2026