CVE-2026-48115 Misskey: Improper Authorization in the Announcements API
Attackers can access restricted announcement data due to insufficient permission checks in the Misskey social media platform.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-48115?
CVE-2026-48115 is a medium-severity missing authorization vulnerability in misskey-dev misskey, published on 3 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-285
Which versions are affected by CVE-2026-48115?
How do I fix CVE-2026-48115?
No fix has been published for CVE-2026-48115 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-48115 being exploited?
There is no known exploitation of CVE-2026-48115 in the wild and no public exploit code.
Sources
Also known as GHSA-j49q-76hx-mv8f.