BIT-MASTODON-2026-47777 Mastodon has a consent-check bypass in its remote Collections

Mastodon is a free, open-source social network server based on ActivityPub. In versions there is a missing condition in the check if remote accounts consented to be featured in a remote Collection could lead to attackers bypassing the check and faking consent. An attacker could forge the...

PT-2026-49260

Name of the Vulnerable Software and Affected Versions Mastodon versions prior to 4.6.0 Description A missing condition in the verification process for remote accounts consenting to be featured in a remote Collection allows attackers to bypass checks and fake consent. An attacker can forge the...