Detections
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Echo: libssh2: security update to 1.11.1-1+e4

critical Tenable Self-Hosted Container Security Plugin ID 458239

Description

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

 - libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in
 ssh2_transport_read() that fails to enforce upper bounds on packet_length field. Remote attackers can send
 crafted SSH packets with excessively large packet_length values to corrupt heap memory and achieve remote
 code execution. (CVE-2026-55200)

Solution

Update the libssh2 library and its related packages to version 1.11.1-1+e4 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-55200

Plugin Details

Severity: Critical

ID: 458239

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: High

Score: 7.5

Percentile: 98.27

CVSS v2

Risk Factor: High

Base Score: 9.7

Temporal Score: 7.6

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

CVSS Score Source: CVE-2026-55200

CVSS v3

Risk Factor: High

Base Score: 8.3

Temporal Score: 7.5

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.2

Threat Score: 8.2

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/18/2026

Vulnerability Publication Date: 6/17/2026

Reference Information

CVE: CVE-2026-55200