Detections
Analytics

Golang: stdlib: security update to 1.25.12stdlib: security update to 1.26.5stdlib: security update to 1.27.0-rc.2

high Tenable Cloud Security Plugin ID 444522

Description

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

 - Handshakes which used Encrypted Client Hello could be de-anonymized by a passive network observer due to a
 disclosure of pre-shared key identities in the unencrypted client hello. (CVE-2026-42505)

Solution

Update the stdlib library and its related packages to version 1.25.12 or later.

See Also

https://pkg.go.dev/vuln/GO-2026-5856

Plugin Details

Severity: High

ID: 444522

Version: Revision 1.1

Type: Local

Family: Golang

Published: 7/8/2026

Updated: 7/8/2026

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-42505

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:H/I:N/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: 7/7/2026

Vulnerability Publication Date: 7/7/2026

Reference Information

CVE: CVE-2026-42505