CVE-2026-48115Misskey: Improper Authorization in the Announcements API
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It affects misskey-dev misskey. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.3 MEDIUM (v4.0, CNA)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
- Weakness (CWE)
- CWE-285
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Aug 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
misskey-dev misskey misskey_dev:misskey (from the name) | from 2024.5.0, < 2026.5.4 | CNA record |
References
- https://github.com/misskey-dev/misskey/security/advisories/GHSA-j49q-76hx-mv8fx-refsource-confirm
- https://github.com/misskey-dev/misskey/releases/tag/2026.5.4x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.