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CVE-2022-39200 Details

Description

Dendrite is a Matrix homeserver written in Go. In affected versions events retrieved from a remote homeserver using the `/get_missing_events` path did not have their signatures verified correctly. This could potentially allow a remote homeserver to provide invalid/modified events to Dendrite via this endpoint. Note that this does not apply to events retrieved through other endpoints (e.g. `/event`, `/state`) as they have been correctly verified. Homeservers that have federation disabled are not vulnerable. The problem has been fixed in Dendrite 0.9.8. Users are advised to upgrade. There are no known workarounds for this issue.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CNA: [email protected]CVSS-B:7.3 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/matrix-org/dendrite/commit/2792d0490f3771488bad346981b8c26479a872c3	CVE	PatchThird Party Advisory
https://github.com/matrix-org/dendrite/security/advisories/GHSA-pfw4-xjgm-267c	CVE	Third Party Advisory
https://github.com/matrix-org/dendrite/commit/2792d0490f3771488bad346981b8c26479a872c3	[email protected]	PatchThird Party Advisory
https://github.com/matrix-org/dendrite/security/advisories/GHSA-pfw4-xjgm-267c	[email protected]	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-347	Improper Verification of Cryptographic Signature	[email protected]

Affected Products

Product	Versions
matrix dendrite	< 0.9.8
CPE cpe:2.3:a:matrix:dendrite:::::::: Remediation No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Sep 15, 2022	Initial Analysis	[email protected]