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.
References (4)
Core 4
Core References
Vendor Advisory x_refsource_confirm
https://github.com/fedify-dev/hollo/security/advisories/GHSA-6r2w-3pcj-v4v5
Patch x_refsource_misc
https://github.com/fedify-dev/hollo/commit/329969c502ef092d5c3f9c2c20421c34f4ff0f0e
Release Notes x_refsource_misc
https://github.com/fedify-dev/hollo/releases/tag/0.6.20
Release Notes x_refsource_misc
https://github.com/fedify-dev/hollo/releases/tag/0.7.2
Scores
CVSS v3
7.5
EPSS
0.0002
EPSS Percentile
6.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-862
Status
published
Products (1)
fedify/hollo
0.6.0 - 0.6.20
Published
Feb 09, 2026
Tracked Since
Feb 18, 2026