Description
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 fixed in 0.6.20 and 0.7.2.
Metrics
CVSS 3.1 7.5/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| fedify-dev | hollo | < 0.6.20, 0.7.2; >= 7.0.0, < 0.7.2 |
References
- https://github.com/fedify-dev/hollo/commit/329969c502ef092d5c3f9c2c20421c34f4ff0f0ePatch
- https://github.com/fedify-dev/hollo/releases/tag/0.6.20Product, Release Notes
- https://github.com/fedify-dev/hollo/releases/tag/0.7.2Product, Release Notes
- https://github.com/fedify-dev/hollo/security/advisories/GHSA-6r2w-3pcj-v4v5Exploit, Vendor Advisory
Timeline
- Published
- Feb 9, 2026
- Last modified
- Jun 17, 2026
- NVD status
- Analyzed