CVE WatchAug 10, 2026

CVE-2026-72915

Mastodon is a free, open-source social network server based on ActivityPub. From 4.6.0-beta.1 until 4.6.4 and 4.7.0-beta.1, any logged-in lo

CVSS

7.5

High

EPSS

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KEV

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Exploit Today

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0-100

Published: Aug 10, 2026 · Last modified: Aug 10, 2026 · CWE-200

EPSS · 30d

Not enough EPSS history yet.

Technical description

Mastodon is a free, open-source social network server based on ActivityPub. From 4.6.0-beta.1 until 4.6.4 and 4.7.0-beta.1, any logged-in local user could use the show action in app/controllers/admin/collections_controller.rb to access personally identifying information about another local user in a collection because the controller used the general collection policy instead of the admin collection policy namespace. The exposed data included the other user's current email address and last-used IP address. This issue is fixed in versions 4.6.4 and 4.7.0-beta.1.

Official references

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