Forcepoint ONE incident
Cloud Web Security - Certificate error while accessing certain websites
Forcepoint ONE experienced a minor incident on June 1, 2026 affecting Web Security Cloud, lasting 2d 3h. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jun 01, 2026, 03:18 PM UTC
Customer Impact: Some of our Cloud Web Security customers may experience a certificate error while accessing a few web pages from our Cloud web solution. Description: We are currently investigating a problem which is triggering a certificate error for some of our customers while accessing certain web pages. We will provide further update as we make progress with our investigation. Next update time: 16:30 UTC
- identified Jun 01, 2026, 04:41 PM UTC
Customer Impact: Some of our Cloud Web Security customers may experience a certificate error while accessing a few web pages from our Cloud web solution. Description: We have identified the problem related to a third-party certificate authority certificate chain which are being used by the affected websites. We continue to investigate this further and will provide an update as we make progress.
- identified Jun 02, 2026, 05:53 AM UTC
Customer Impact: Some of our Cloud Web Security customers may experience a certificate error while accessing a few web pages from our Cloud web solution. Description: We have identified the problem where our Cloud Web proxy solution is unable to correctly validate a certificate chain presented by the impacted websites. We continue to investigate the root cause further and will revert as soon as we have a remediation plan identified.
- identified Jun 02, 2026, 12:48 PM UTC
Customer Impact: Some of our Cloud Web Security customers may experience a certificate error while accessing a few web pages from our Cloud web solution. Description: We have identified the problem where our Cloud Web proxy solution is unable to correctly validate a certificate chain presented by the impacted websites. We have developed a fix and are currently working on performing a thorough validation before the fix is rolled out across our production fleet.
- identified Jun 02, 2026, 06:19 PM UTC
Customer Impact: Some of our Cloud Web Security customers may experience a certificate error while accessing a few web pages from our Cloud web solution. Description: We have started the process of rolling out the fix across our fleet. The fix has been applied to London B (LONB) data center successfully and we are noticing positive results. We will provide an update once the fix is rolled out to all target environments.
- identified Jun 03, 2026, 07:16 AM UTC
Customer Impact: Some of our Cloud Web Security customers may experience a certificate error while accessing a few web pages from our Cloud web solution. Description: The fix roll-out is in progress and has been successfully deployed across all our data centers in APAC (Tokyo, Singapore, Mumbai and Sydney). We are currently working on rolling out the fix across our EMEA data centers.
- monitoring Jun 03, 2026, 06:50 PM UTC
Customer Impact: Some of our Cloud Web Security customers may experience a certificate error while accessing a few web pages from our Cloud web solution. Description: Fix has been rolled out across all our data centers and we are monitoring the service for stability.
- resolved Jun 03, 2026, 07:00 PM UTC
This incident has been resolved.