Pantheon Operations Status

Resolved: This incident has been resolved.

Monitoring: A fix has been implemented and we are monitoring the results.

Identified: We have identified the cause of the 504 errors affecting the site. Service has been restored, and our verification confirms that uncached requests to the live site are returning successfully.

The issue was caused by an interruption of the database server supporting the site. The database has recovered, and our Engineering team is completing cleanup and validating the affected environment, including a previously unsuccessful database migration.

We are continuing to monitor the site and will provide another update as soon as more information becomes available. If you continue to experience issues, please contact [email protected].

Investigating: We are investigating reports that a subset of Pantheon-hosted sites are returning 504 Gateway Timeout errors due to a database server issue.

Customers may experience site timeouts or failed page loads, and database migrations for affected environments may also be impacted.

Our Engineering team is actively working to restore normal service and verify that affected database operations are completing successfully. Some affected sites have begun recovering, but intermittent errors may continue while the investigation remains ongoing.

We will post updates as soon as more information becomes available. If you need immediate assistance, please contact [email protected].

Resolved: This incident has been resolved.

Monitoring: Remediation and platform hardening remain ongoing.

We are continuing to monitor systems closely while working directly with affected customers.

Monitoring: We are continuing to monitor and work through the remaining remediation and hardening. Our initial response is complete, and we are now working directly with the affected customers on site cleanup and credential rotation.

We have added further protections and monitoring to help prevent and detect this type of activity. Based on the information available to us, we have found no evidence that any other customer's site or data was accessed. We will share another update as the remaining work progresses.

As a reminder, the most effective protection is keeping your site current: please keep your CMS, plugins, themes, and modules up to date, remove anything you no longer use, review your user and credential access, and contact Pantheon Support if you notice unexpected code, deployments, or other changes on your site.

Monitoring: As our investigation has continued, we have determined that a small number of customer sites — not one — were affected.

In each case, the site was first compromised through a weakness in its own application, then used to interact with platform services. We are working directly with the affected customers on cleanup and credential rotation, and we have added platform controls to restrict this activity and detection to identify it going forward.

The activity remains limited to the individual affected sites and their own data. We have found no evidence that any other customer's site or data was accessed.

What you can do: Keeping your site current is the most effective protection. Please update your CMS core, plugins, themes, and modules to the latest versions; remove plugins, themes, and modules you don't use; and delete sites you no longer need. If you notice unexpected code, deployments, or changes on your site, contact Pantheon Support.

We will continue to post updates here.

Monitoring: Beginning September 29, Pantheon identified malicious activity in which an attacker gained control of a customer website and used it to target platform resources.

Activity from the compromised site attempted to exploit a Linux kernel vulnerability (CVE-2026-53362) on platform application hosts, and some sites may have briefly experienced interruptions as a result.

We have taken the following actions:

• Disabled and deleted the affected site.
• Accelerated the operating-system and kernel updates already in progress, bringing application hosts to a version that addresses this vulnerability.
• Deployed additional platform protections and monitoring.

We have notified the affected customer directly. The compromise was limited to that single site; based on the information available to us, we have found no evidence of platform-wide data exfiltration or that this activity exposed data belonging to other customers. We are continuing to review platform activity and will update this advisory if that changes.

How to protect your site: Attackers most often gain control of a site through outdated or unmaintained code. Keeping your site current is the most effective protection. We strongly encourage all customers to keep CMS core, plugins, and themes fully updated, remove and delete sites and code you no longer use, and review user and credential access. If you notice unexpected code, deployments, or changes on your site, contact Pantheon Support.

We will post updates here as more information becomes available. If you have questions, please contact Pantheon Support.

Resolved: This incident on Pantheon Dashboard and workspace operations has been resolved.

Monitoring: We are continuing to monitor for any further issues.

Monitoring: A fix has been implemented and we are monitoring the results.

Investigating: We are continuing to investigate this issue.

Investigating: We are investigating an issue causing intermittent errors in the Pantheon Dashboard and some workspace operations. Customers may experience failed page loads or intermittent authorization errors when accessing the Dashboard or managing workspace resources.

Our Engineering team is actively reviewing the issue and working to restore normal functionality. We will provide another update within 1–3 hours, or sooner if more information becomes available. If you are unable to access the Dashboard and need urgent assistance, please contact [email protected].