Update - We are continuing to monitor for any further issues.
Sep 05, 2025 - 13:52 PDT
Monitoring - Pantheon has been made aware of a widespread security incident impacting companies that use Drift, a third-party vendor used for communicating with visitors on our website via chat. We, and our customers, are affected by this breach.
The Pantheon platform and customer-hosted websites were not impacted.
Our investigation has confirmed that a threat actor exploited a vulnerability in the Salesloft Drift application’s OAuth integration with Salesforce to gain unauthorized access to CRM data. Pantheon was notified on August 28, 2025 of this compromise that occurred between August 12–15, 2025.
The breach resulted in the exfiltration of business information about customer renewals and internal sales account data from our CRM system. While this exposure was limited to Salesforce data connected through Drift, some contact details related to accounts were compromised. Our platform and your hosted websites were not infiltrated and have not been affected.
Upon learning of the incident, Pantheon took immediate steps to contain the threat and safeguard customer data, including:
- Locking down permissions across Salesforce Apps to prevent unauthorized access. - Removing vulnerable applications associated with Salesforce.
We continue to work closely with Salesforce and Salesloft Drift to conduct a forensic analysis and confirm the full scope of the event. Protecting our customers’ data and maintaining their trust is our highest priority.
As we continue our investigation, we are also conducting thorough reviews of our defenses and security assessments for all third-party integrations. Updates will be shared here as more information becomes available.
If you have questions or concerns, please reach out to your Customer Success Manager.
Sep 05, 2025 - 13:50 PDT
In order to improve the customer experience and keep our systems updated with the latest scalable technologies, Pantheon will be performing scheduled maintenance on Tuesday, September 9, 2025.
During this maintenance window, there will be a temporary interruption of Billing Operations and Workflows used to create new sites or environments or modify site or environment configuration. We apologize for any inconvenience this may cause and assure you that our team will work diligently to minimize any disruption.
We do not anticipate any impact to your site(s) uptime during this maintenance window.
We understand the importance of our services to your business, and we assure you that our team will complete the maintenance as quickly as possible. We will also keep you informed of any updates or changes during the maintenance process. Should you have any questions or concerns, please reach out to our customer support team via chat or email us at Pantheon Helpdesk. Posted on
Sep 04, 2025 - 06:21 PDT
PHP Runtime Generation 2 will begin rolling out on September 17 over a 40-day period, starting with dev environments of free sites then gradually moving through all site plans.
What’s New in PHP Runtime Generation 2: - Support for the latest PHP versions, including PHP 8.4 - Long-Term Support (LTS) editions for PHP - Updated PHP extensions and improved security features
For more details and instructions, visit our documentation (https://docs.pantheon.io/php-runtime-generation-2). Our support team is available to help if you have any additional questions or need assistance. Posted on
Sep 02, 2025 - 11:54 PDT
Resolved -
Earlier today, we identified an issue that temporarily affected certain workflows. This did not impact site uptime. The issue has since been resolved, and workflows are now operating normally.
At this time, we believe this was a transient issue, but our team is working to identify the root cause. If you continue to experience any workflow-related problems, please contact Support, and we'll be happy to assist.
Sep 5, 16:07 PDT
Resolved -
This incident has been resolved. Dashboard and Terminus Operations are back to normal.
Sep 2, 18:38 PDT
Monitoring -
The issue has been mitigated, and performance has returned to normal. We are monitoring to ensure stability.
As a precaution, our team has implemented additional monitoring systems and is closely observing the behavior. We will provide another update in approximately 4 hours or sooner if new information becomes available.
Sep 2, 15:23 PDT
Update -
We are continuing to investigate this issue and have identified that Terminus commands are also affected in addition to slower-than-normal Dashboard performance.
Our engineering team is actively working to determine the root cause and implement a resolution.
We will share further updates as soon as more information is available.
Sep 2, 13:54 PDT
Investigating -
We are currently investigating reports of slower-than-normal Dashboard performance. At this time, we want to clarify that no site downtime has been reported in relation to this incident.
Our engineering team is actively working to identify the root cause and implement a resolution. If you require immediate assistance, please contact us via email: helpdesk@pantheon.io
We will provide the next update as soon as more information becomes available. Thank you for your patience and understanding.
Sep 2, 13:17 PDT
Resolved -
We received reports of site creation issues resulting in a blank page. Our Engineering team investigated and has already applied a fix. The incident is now resolved.
If you continue to experience any issues with site creation, please don’t hesitate to reach out to Support via chat or ticket, and we’ll promptly look into it.
Aug 28, 12:43 PDT
Resolved -
The intermittent deployment interruptions following our recent security maintenance have been resolved. All systems are now operating normally, and we will continue to closely monitor performance to ensure stability.
Aug 27, 16:13 PDT
Monitoring -
Following recent routine security maintenance, we identified an increase in deployment failures. We have taken measures to mitigate this and are closely monitoring deployment stability. If you experience an issue, please contact our support team so we can assist you directly.
Aug 22, 09:25 PDT