CVE-2026-23962

Mastodon is a free, open-source social network server based on ActivityPub. Mastodon versions before v4.3.18, v4.4.12, and v4.5.5 do not have a limit on the maximum number of poll options for remote posts, allowing attackers to create polls with a very large amount of options, greatly increasing...

CVE-2026-23962

Mastodon is vulnerable to Denial of Service due to an unlimited maximum number of poll options for remote posts in versions before v4.3.18, v4.4.12, and v4.5.5. The underlying issue allows an attacker to create polls with a very large number of options, leading to disproportionate resource usage ...

CVE-2026-23962 Mastodon vulnerable to Denial of Service from a single post (client/server)

Mastodon is a free, open-source social network server based on ActivityPub. Mastodon versions before v4.3.18, v4.4.12, and v4.5.5 do not have a limit on the maximum number of poll options for remote posts, allowing attackers to create polls with a very large amount of options, greatly increasing...