Detections
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Echo: libssh: security update to 0.12.2-1

medium Tenable Cloud Security Plugin ID 464347

Description

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

 - A flaw was found in libssh. A remote authenticated peer can advertise a zero maximum packet size in
 SSH_MSG_CHANNEL_OPEN, causing later channel writes to loop indefinitely and consume CPU, leading to denial
 of service. (CVE-2026-59843)

Solution

Update the libssh library and its related packages to version 0.12.2-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-59843

Plugin Details

Severity: Medium

ID: 464347

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.72

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-59843

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/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: 7/21/2026

Vulnerability Publication Date: 7/21/2026

Reference Information

CVE: CVE-2026-59843

IAVA: 2026-A-0788