CVE-2026-25808

Hollo (federated single-user microblogging) is affected by a vulnerability in the ActivityPub outbox that exposed DMs and followers-only posts prior to version 0.6.20 and 0.7.2. The issue is resolved in those versions (0.6.20 and 0.7.2). The CVSS is provided (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N; ...

CVE-2026-25808 Hollo DMs get leaked and can be seen on Webfinger Browser

Hollo is a federated single-user microblogging software designed to be federated through ActivityPub. Prior to 0.6.20 and 0.7.2, there is a security vulnerability where DMs and followers-only posts were exposed through the ActivityPub outbox endpoint without authorization. This vulnerability is...