CVE-2026-25808

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/fedify-dev/hollo/commit/329969c502ef092d5c3f9c2c20421c34f4ff0f0e	Patch
https://github.com/fedify-dev/hollo/releases/tag/0.6.20	Product Release Notes
https://github.com/fedify-dev/hollo/releases/tag/0.7.2	Product Release Notes
https://github.com/fedify-dev/hollo/security/advisories/GHSA-6r2w-3pcj-v4v5	Vendor Advisory Exploit

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:fedify:hollo::::::::
	cpe:2.3:a:fedify:hollo::::::::

History

No history.

Information

Published : 2026-02-09 22:16

Updated : 2026-02-28 00:17

NVD link : CVE-2026-25808

Mitre link : CVE-2026-25808

CVE.ORG link : CVE-2026-25808

JSON object : View

Products Affected

fedify

hollo

CWE

CWE-862

Missing Authorization

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