Vendor
misskey-dev
38 known vulnerabilities.
Products
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Critical 9.2
Misskey: JSON-LD signature validation + compaction may lead to improper activity handling
Misskey is an open source, federated social media platform. Versions 12.37.0 and later, but prior to 2026.5.4, contain a vulnerability in the JSON-LD signature validation and compaction process that allows spoofed activities to be accepted as valid. This issu…
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Critical 9.2
Misskey lacks proper authorization checks and input validation
Misskey is an open source, federated social media platform. All Misskey servers running versions 8.45.0 and later, but prior to 2026.3.1, contain a vulnerability that allows bad actors access to data that they ordinarily wouldn't be able to access due to insu…
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Critical 9.3
Misskey's Incomplete Patch of CVE-2024-52591 Leads to Forgery of Federated Notes
Misskey is an open source, federated social media platform. The patch for CVE-2024-52591 did not sufficiently validate the relation between the `id` and `url` fields of ActivityPub objects. An attacker can forge an object where they claim authority in the `ur…
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Critical 9.1
Misskey vulnerable to improper authorization when accessing with third-party application
Misskey is an open source, decentralized social media platform. Third-party applications may be able to access some endpoints or Websocket APIs that are incorrectly specified as [kind](https://github.com/misskey-dev/misskey/blob/406b4bdbe79b5b0b68fcdcb3c4b6e4…
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Critical 9.3
Misskey's missing signature validation allows arbitrary users to impersonate any remote user.
Misskey is an open source, decentralized social media platform. Misskey's missing signature validation allows arbitrary users to impersonate any remote user. This issue has been patched in version 2023.11.1-beta.1.