Check Point Advisories

Golang Go Crypto Security Bypass (CVE-2026-42508)

Vulnerability
Protection

Check Point Reference:	CPAI-2026-9716
Date Published:	3 Aug 2026
Severity:	Critical
Last Updated:	Monday 03 August, 2026
Source:
Industry Reference:	CVE-2026-42508
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Golang Go Crypto prior to 0.52.0
Vulnerability Description	A security bypass vulnerability in Golang Go Crypto allows attackers to bypass revocation checks for SignatureKey belonging to a CA, potentially compromising the integrity of the system.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the Golang Go Crypto Security Bypass (CVE-2026-42508) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: SSH Protection Violation.
Attack Information: Golang Go Crypto Security Bypass (CVE-2026-42508)