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

high Tenable Cloud Security Plugin ID 464224

Description

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

 - libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem
 response and uses it in the allocation num_attrs * sizeof(libssh2_publickey_attribute) without bounds
 checking, so on 32-bit platforms the multiplication overflows to an undersized buffer. A malicious SSH
 server can then drive the attribute-parsing loop to write past the allocation, causing a heap buffer
 overflow in a connecting libssh2 client. (CVE-2026-58050)

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-2026-58050

Plugin Details

Severity: High

ID: 464224

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.77

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2026-58050

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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:P/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.3

Threat Score: 7

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/29/2026

Vulnerability Publication Date: 6/28/2026

Reference Information

CVE: CVE-2026-58050