Is Pantheon Operations Down?

This incident has been resolved. --- [2026-09-14T18:01:39.137-07:00] (monitoring) We have completed mitigation for this incident. All confirmed affected accounts have had passwords reset and unauthorized access, machine tokens, and SSH keys revoked. All confirmed affected account holders and site owners have been contacted directly. We will continue monitoring the situation and share an update if anything changes. --- [2026-09-14T00:02:44.803-07:00] (monitoring) We have no new developments to share. We're continuing to keep the affected accounts secure, including resetting passwords and revoking any unauthorized access, machine tokens, and SSH keys. Pantheon's systems were not compromised. We're continuing to reach out to affected account holders and site owners directly with guidance on next steps. --- [2026-09-13T09:26:51.988-07:00] (monitoring) We have completed mitigation steps for the compromised accounts, including resetting passwords and revoking unauthorized access, machine tokens, and SSH keys. We are continuing to notify affected account holders and site owners directly. Customers who are affected will receive specific guidance from Pantheon through our support channels. Pantheon’s systems were not compromised. We will continue monitoring the situation and provide further updates as our review progresses. --- [2026-09-12T15:51:05.344-07:00] (identified) We have identified the cause of this incident and are actively responding. Our evidence indicates the affected accounts were accessed using passwords captured on a fraudulent copy of the Pantheon login page, reached through sponsored search results and not through any compromise of Pantheon's own systems We are securing the affected accounts, resetting credentials, and revoking access created by the unauthorized party. As part of this, you will receive a routine password-reset email. We are also contacting affected account holders and site owners directly; those security notifications will come from helpdesk@pantheon.io and are genuine. --- [2026-09-12T10:09:08.694-07:00] (investigating) We are correcting our initial assessment. Our earlier update said the affected accounts were accessed with passwords stolen in third-party data breaches. Our evidence indicates that credentials were captured on a fraudulent copy of the Pantheon sign-in page. The look-alike page was promoted through paid search results and links, and it forwarded users to the real Pantheon Dashboard after capturing what they typed, so many affected users saw nothing unusual. We have identified and reported one such site. Sites of this kind are usually replaced quickly. We are continuing to search for others and to work with the providers involved. Pantheon's systems were not breached. Once inside an account, the unauthorized party used normal account functions: creating machine tokens, adding SSH keys, and on some affected sites, deploying code to production. We will be contacting affected account holders and site owners directly once we confirm the list of affected accounts, resetting credentials, and revoking tokens and keys on those accounts. If you are not contacted, we have no indication your account was accessed. How to protect your account Sign in only by typing https://dashboard.pantheon.io into your browser or using a bookmark you created. Do not sign in from a search result, a sponsored ad, or a link in an email or chat message, even one that appears to come from Pantheon. Before you type a password, check that the address bar shows dashboard.pantheon.io spelled exactly; look-alike pages differ by a letter or two. Turn on multi-factor authentication for your Pantheon account (Personal Settings, then Security). Instructions: https://docs.pantheon.io/release-notes/2026/04/mfa If you have signed in from a search result or emailed link recently, change your password now, then review your account: remove SSH keys you do not recognize (https://docs.pantheon.io/ssh-keys), revoke machine tokens you did not create (https://docs.pantheon.io/machine-tokens), and check your site and workspace team lists for members you did not add. Pantheon will never ask for your password by email, chat, or phone. Report suspicious sign-in pages or messages to abuse@pantheon.io. Our security practices and contacts are published at https://pantheon.io/security and https://trust.pantheon.io. --- [2026-09-12T03:18:25.982-07:00] (investigating) Our team is still investigating the issue. The next update will be in 6 hours or when a new major update comes. --- [2026-09-11T21:16:05.365-07:00] (investigating) We are continuing to investigate this issue. --- [2026-09-11T21:13:15.433-07:00] (investigating) We are currently investigating reports of unauthorized access to a small number of Pantheon customer accounts. Our evidence suggests these accounts were accessed using credentials stolen from external third-party data breaches (unrelated to Pantheon). This technique, known as "credential stuffing," relies on reused passwords.

The scheduled maintenance has been completed. --- [2026-09-08T18:00:08.263-07:00] (in_progress) Scheduled maintenance is currently in progress. We will provide updates as necessary. --- [2026-09-08T17:00:21.775-07:00] (scheduled) Maintenance will begin as scheduled in 60 minutes. --- [2026-09-03T19:18:02.530-07:00] (scheduled) We will be undergoing scheduled maintenance during this time. --- [2026-09-03T04:38:46.777-07:00] (scheduled) We will be undergoing scheduled maintenance during this time. --- [2026-09-03T04:35:46.841-07:00] (scheduled) During this maintenance window, there will be a temporary interruption of site management workflows. Specifically, deployments and database operations will be interrupted. In addition, jobs queued in advance of the window will fail during the window. We recommend you avoid starting workflows during the maintenance window. 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 the Pantheon Helpdesk.

This incident has been resolved. --- [2026-09-03T11:44:15.548-07:00] (monitoring) A fix has been implemented and we are monitoring the results. --- [2026-09-03T11:23:52.572-07:00] (investigating) We are currently investigating an issue causing 504 errors on a subset of hosted customer sites. Some visitors may experience timeouts or failed page loads. Our team is actively working to identify the root cause. We will post an update as soon as we have more information. If you need immediate assistance: General concerns: Open a chat with our support bot and request to open a ticket for urgent cases. If the Dashboard is inaccessible: Email us directly at helpdesk@pantheon.io. We will provide another update within 30–60 minutes, or as soon as new information becomes available. Thank you for your patience.