Detections
Analytics

SCA: security update for matrix-synapse (GHSA-vmcc-4p4x-x7wg)

high Tenable Self-Hosted Container Security Plugin ID 434574

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Matrix Synapse before 0.28.1 is prone to a denial of service flaw where malicious events injected with
 depth = 2^63 - 1 render rooms unusable, related to federation/federation_base.py and handlers/message.py,
 as exploited in the wild in April 2018. (CVE-2018-10657)

See Also

https://github.com/advisories/GHSA-vmcc-4p4x-x7wg

Plugin Details

Severity: High

ID: 434574

Version: Revision 1.2

Type: Local

Family: SCA Checks

Published: 8/19/2025

Updated: 1/28/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2018-10657

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 5/14/2022

Vulnerability Publication Date: 5/1/2018

Reference Information

CVE: CVE-2018-10657

cwe: CWE-20