Detections
Analytics
SCA: security update for matrix-synapse (GHSA-4mp3-385r-v63f)
high Tenable Self-Hosted Container Security Plugin ID 410288
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- Matrix Synapse before 1.20.0 erroneously permits non-standard NaN, Infinity, and -Infinity JSON values in
fields of m.room.member events, allowing remote attackers to execute a denial of service attack against
the federation and common Matrix clients. If such a malformed event is accepted into the room's state, the
impact is long-lasting and is not fixed by an upgrade to a newer version, requiring the event to be
manually redacted instead. Since events are replicated to servers of other room members, the impact is not
constrained to the server of the event sender. (CVE-2020-26890)
See Also
Plugin Details
Severity: High
ID: 410288
Version: Revision 1.4
Type: Local
Family: SCA Checks
Published: 1/23/2025
Updated: 7/2/2026
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-2020-26890
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
CVSS v4
Risk Factor: High
Base Score: 8.7
Threat Score: 6.6
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Vulnerability Information
Exploit Ease: No known exploits are available
Patch Publication Date: 11/24/2020
Vulnerability Publication Date: 11/24/2020
Reference Information
CVE: CVE-2020-26890
cwe: CWE-20