CVE-2026-25808

7.5 HIGH
Published: February 09, 2026 Modified: February 28, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/fedify-dev/hollo/releases/tag/0.6.20
Source: security-advisories@github.com
Product Release Notes
https://github.com/fedify-dev/hollo/releases/tag/0.7.2
Source: security-advisories@github.com
Product Release Notes
https://github.com/fedify-dev/hollo/security/advisories/GHSA-6r2w-3pcj-v4v5
Source: security-advisories@github.com
Vendor Advisory Exploit

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
EPSS (Exploit Probability)
0.0%
4th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

fedify