HOMEVULNERABILITIESCVE-2022-39200
MEDIUM

CVE-2022-39200

CWE-347Published: September 12, 2022· Updated: Jun 17, 2026

5.3
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2022-39200 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected Vendors & Products

matrix1 product(s)
dendrite
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/matrix-org/dendrite/commit/2792d0490f3771488bad346981b8c26479a872c3
PATCHhttps://github.com/matrix-org/dendrite/commit/2792d0490f3771488bad346981b8c26479a872c3
ADVISORYhttps://github.com/matrix-org/dendrite/security/advisories/GHSA-pfw4-xjgm-267c
ADVISORYhttps://github.com/matrix-org/dendrite/security/advisories/GHSA-pfw4-xjgm-267c

All References (4)

→
https://github.com/matrix-org/dendrite/commit/2792d0490f3771488bad346981b8c26479a872c3Patch · Third Party Advisory
→
https://github.com/matrix-org/dendrite/security/advisories/GHSA-pfw4-xjgm-267cThird Party Advisory
→
https://github.com/matrix-org/dendrite/commit/2792d0490f3771488bad346981b8c26479a872c3Patch · Third Party Advisory
→
https://github.com/matrix-org/dendrite/security/advisories/GHSA-pfw4-xjgm-267cThird Party Advisory

Quick Facts

CVE IDCVE-2022-39200
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-347
CISA KEVNo
Affected1 vendor(s)
PublishedSep 12, 2022

Related CVEs (CWE-347)

CVE-2026-56451
10.0
CVE-2026-48558
KEV10.0
CVE-2024-32962
10.0
CVE-2026-44748
9.9
CVE-2019-13177
9.8
CVE-2019-6318
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2022-39200 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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