Known Vulnerabilities for Activitypub by Automattic

Listed below are 5 of the newest known vulnerabilities associated with "Activitypub" by "Automattic".

These CVEs are retrieved based on exact matches on listed software, hardware, and vendor information (CPE data) as well as a keyword search to ensure the newest vulnerabilities with no officially listed software information are still displayed.

Data on known vulnerable versions is also displayed based on information from known CPEs

Known Vulnerabilities

CVE Shortened Description Severity Publish Date Last Modified
CVE-2026-53950 json @tryghost/activitypub is Ghost’s social/federation client app. Prior to 3.1.0, the ActivityPub client in Ghost was vulnerab... Not Provided 2026-06-24 2026-06-24
CVE-2026-50131 json Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Fedify previously addressed SSRF/in... Not Provided 2026-06-10 2026-06-11
CVE-2026-50129 json Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.5.11, 4.4.18, and 4.3.24, a DoS can be... Not Provided 2026-06-24 2026-06-24
CVE-2026-50128 json Mastodon is a free, open-source social network server based on ActivityPub. From 4.3.0 until 4.5.11 and 4.4.18, Mastodon has ... Not Provided 2026-06-24 2026-06-24
CVE-2026-48028 json Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.5.10, 4.4.17, and 4.3.23, Mastodon's n... Not Provided 2026-06-24 2026-06-24
CVE-2026-47777 json Mastodon is a free, open-source social network server based on ActivityPub. In versions there is a missing condition in the c... Not Provided 2026-06-15 2026-06-15
CVE-2026-47389 json Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.5.10, 4.4.17, and 4.3.23, when using R... Not Provided 2026-06-24 2026-06-24
CVE-2026-46349 json Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.5.10, 4.4.17, and 4.3.23, Mastodon's n... Not Provided 2026-06-24 2026-06-24
CVE-2026-46348 json Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.5.10, 4.4.17, and 4.3.23, the list of ... Not Provided 2026-06-24 2026-06-24
CVE-2026-42462 json Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to versions 1.9.11, 1.10.10, ... Not Provided 2026-06-10 2026-06-11
Results limited to 10 most recent vulnerabilities
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