CVE-2026-25808
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductFedify Hollo
PublishedFeb 9, 2026
First seenFeb 9, 2026
Weakness typeCWE-862Missing authorization
How to fix
Update
- fedify hollo0.6.20, 0.7.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| fedify hollo | 0.6.0 ≤ v < 0.6.20, 0.7.0 ≤ v < 0.7.2 | 0.6.20, 0.7.2 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.