CVE-2026-28432

HIGH
2026-03-10 [email protected]
7.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
CVE Published
Mar 10, 2026 - 07:43 nvd
HIGH 7.5

Tags

Authentication Bypass Misskey

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.

Analysis

federated social media platform. All Misskey server versions up to 2026.3.1 is affected by improper verification of cryptographic signature.

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Remediation

Within 24 hours: Inventory all Misskey instances in use and confirm affected versions; enable enhanced logging for authentication and federation events. Within 7 days: Implement network-level monitoring for suspicious federation traffic; restrict federation connections to trusted instances only; disable public federation if operationally feasible. …

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Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +38
POC: 0

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CVE-2026-28432 vulnerability details – vuln.today
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