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    CVE-2026-48115

    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.

    Published:Aug 3, 2026
    Last Modified:Aug 5, 2026
    EPS:Aug 3, 2026
    EPSS Score:0.00249
    CVSS Score:6.3

    Affected Products

    Vendor
    Misskey
    Product
    Misskey

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-285 Improper Authorization

    Related CVEs

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    CVE-2026-46712 (CVSS 2.3) — Misskey is an open source, federated social media platform. Versions 2025.3.2 and later, but prior to 2026.5.4…
    CVE-2026-57574 (CVSS 7.4) — Misskey is an open source, federated social media platform. Prior to 2026.6.0, Misskey contains a vulnerabilit…
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    CVE-2026-28433 (CVSS 2.3) — Misskey is an open source, federated social media platform. All Misskey servers running versions 10.93.0 and l…
    CVE-2026-28432 (CVSS 7.1) — Misskey is an open source, federated social media platform. All Misskey servers prior to 2026.3.1 contain a vu…
    CVE-2026-28431 (CVSS 9.2) — Misskey is an open source, federated social media platform. All Misskey servers running versions 8.45.0 and la…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High