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CVE

CWE

Training

CVE-2026-25808

Published: Feb 9, 2026

Modified: Feb 10, 2026

PUBLISHED

CVSS v3.1

7.5

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.

Vendor	Product	Versions
fedify-dev	hollo	affected `< 0.6.20, 0.7.2` affected `>= 7.0.0, < 0.7.2`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

References

https://github.com/fedify-dev/hollo/security/advisories/GHSA-6r2w-3pcj-v4v5

x_refsource_CONFIRM

https://github.com/fedify-dev/hollo/commit/329969c502ef092d5c3f9c2c20421c34f4ff0f0e

x_refsource_MISC

https://github.com/fedify-dev/hollo/releases/tag/0.6.20

x_refsource_MISC

https://github.com/fedify-dev/hollo/releases/tag/0.7.2

x_refsource_MISC

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