CVE-2026-28432
HIGHCVSS v3
7.5
HIGH
EPSS Score
0.0%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Misskey is an open source, federated social media platform. All Misskey servers prior to 2026.3.1 contain a vulnerability that allows bypassing HTTP signature verification. Although this is a vulnerability related to federation, it affects all servers regardless of whether federation is enabled or disabled. This vulnerability is fixed in 2026.3.1.
Technical Details
- CVSS v3 Vector
- 3.1
- Published
- 3/10/2026
- Last Modified
- 3/13/2026
Frequently Asked Questions
What is CVE-2026-28432?
Misskey is an open source, federated social media platform. All Misskey servers prior to 2026.3.1 contain a vulnerability that allows bypassing HTTP signature verification. Although this is a vulnerability related to federation, it affects all servers regardless of whether federation is enabled or disabled. This vulnerability is fixed in 2026.3.1.
Is CVE-2026-28432 actively exploited?
Active exploitation of CVE-2026-28432 has not been confirmed. The EPSS score is 0.0%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-28432?
CVE-2026-28432 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string 3.1.
Is CVE-2026-28432 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.