Google Workspace incident
We are experiencing an issue with ChromeOS M-139.
Google Workspace experienced a minor incident on August 19, 2025 affecting ChromeOS, lasting 9d 13h. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- monitoring Aug 27, 2025, 07:14 PM UTC
Description: We are experiencing an issue with ChromeOS M-139. Our engineering team continues to investigate the issue. We will provide more information by Wednesday, 2025-08-27 13:00 US/Pacific with current details. We apologize to all who are affected by the disruption. Symptoms: Authentication failures are occurring on ChromeOS M-139, affecting Single Sign-On (SSO) with educational partners Clever and Classlink. The issue is also causing 2-Step Verification (2SV) to fail for some users. Workarounds: There are 2 workarounds and you can follow one of them. 1. Rollback to the previous version M138. Detailed instructions https://support.google.com/chrome/a/answer/12569990. OR 2. Change LoginAuthenticationBehavior (https://chromeenterprise.google/policies/#LoginAuthenticationBehavior) to "Authentication via the default GAIA flow"
- monitoring Aug 27, 2025, 08:22 PM UTC
Description: This affects only ChromeOS devices on the following OS/Browser Version: 16328.55.0/139.0.7258.137 Mitigation work is currently underway by our engineering team. After identifying the root cause, our engineering team immediately halted the release of the affected version to additional devices. The fix has been identified and tested, and the build for the fix is currently underway. The version with the fix is expected to be available by tomorrow. We will provide an update by Thursday, 2025-08-28 13:30 US/Pacific with current details. Symptoms: Authentication failures are occurring on ChromeOS devices with OS/Browser versions 16328.55.0/139.0.7258.137, affecting Single Sign-On (SSO) with educational partners Clever and Classlink. The issue is also causing 2-Step Verification (2SV) to fail for some users. Workaround: There are 2 workarounds and you can follow one of them. 1. Rollback to the previous version M138. Detailed instructions https://support.google.com/chrome/a/answer/12569990. OR 2. Change LoginAuthenticationBehavior (https://chromeenterprise.google/policies/#LoginAuthenticationBehavior) to "Authentication via the default GAIA flow"
- monitoring Aug 28, 2025, 05:21 PM UTC
Description: This affects only ChromeOS devices on the following OS/Browser Version: 16328.55.0/139.0.7258.137 Mitigation work is taking longer than anticipated. Fix is undergoing automated testing. Once completed, engineering will validate the results and we'll make the fix available to users. We currently don't have ETA for the version with the fix to be available. We will provide an update by Thursday, 2025-08-28 17:30 US/Pacific with current details. Symptoms: Authentication failures are occurring on ChromeOS devices with OS/Browser versions 16328.55.0/139.0.7258.137, affecting Single Sign-On (SSO) with educational partners Clever and Classlink. The issue is also causing 2-Step Verification (2SV) to fail for some users. Workaround: There are 2 workarounds and you can follow one of them. 1. Rollback to the previous version M138. Detailed instructions https://support.google.com/chrome/a/answer/12569990. OR 2. Change LoginAuthenticationBehavior (https://chromeenterprise.google/policies/#LoginAuthenticationBehavior) to "Authentication via the default GAIA flow"
- resolved Aug 28, 2025, 09:32 PM UTC
Description: The issue with ChromeOS has been resolved for all affected users as of Thursday, 2025-08-28 13:20 PDT. From preliminary analysis, the issue was triggered by a change in the backend authentication method, which resulted in Single Sign-On (SSO) failures or 2-Step Verification (2SV) to fail for some users. After identifying the root cause, our engineering team immediately halted the release of the affected Chrome OS/Browser version (16328.55.0/139.0.7258.137) to additional devices. The fix was identified and tested, after which it has been successfully deployed in version 16328.65.0/ 139.0.7258.164. Customers previously affected by this issue may update their Chrome OS/Browser versions to 16328.65.0/139.0.7258.164. We thank you for your patience while we worked on resolving the issue. Symptoms: Authentication failures were occurring on ChromeOS devices with OS/Browser versions 16328.55.0/139.0.7258.137, affecting Single Sign-On (SSO) with educational partners Clever and Classlink. The issue also caused 2-Step Verification (2SV) to fail for some users.