Detections
Analytics

SCA: security update for golang.org/x/crypto/ssh/knownhosts (GHSA-5cgq-3rg8-m6cv)

high Tenable Cloud Security Plugin ID 443943

Description

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

 - Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation. Now, both
 the 'key' and 'key.SignatureKey' are checked for @revoked. (CVE-2026-42508)

Solution

Update the golang.org/x/crypto/ssh/knownhosts library and its related packages to version 0.52.0 or later.

See Also

https://github.com/advisories/GHSA-5cgq-3rg8-m6cv

Plugin Details

Severity: High

ID: 443943

Version: Revision 1.3

Type: Local

Family: SCA Checks

Published: 6/26/2026

Updated: 6/30/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.62

Vendor

Vendor Severity: Critical

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

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

CVSS Score Source: CVE-2026-42508

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.4

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/25/2026

Vulnerability Publication Date: 5/12/2026

Reference Information

CVE: CVE-2026-42508

cwe: CWE-295