Security update: Preventative certificate security measures

Summary

Security update: Preventative certificate security measures

Please visit our Security Advisories page at <https://www.notion.com/security/advisories> for any future updates.

• Started

  Oct 20, 2026 · 7:00 PM

• Resolved

  Oct 26, 2026 · 6:23 PM

• Duration

  5d 23h 23m

• Severity

  None

• ◐

  Investigating

  Oct 20 · 7:00 PM Notion

  We are aware of a security issue involving eMudhra, a third-party certificate authority used to verify secure internet connections. Our security and engineering teams are assessing potential exposure and proactively updating affected software and certificate bundles across our services and applications. At this time, we have not identified evidence that Notion has been compromised in connection with this issue. This work is a preventative security measure, rather than a response to a service outage. We’re taking precautionary steps to update affected certificate-validation components and block trust in the affected certificates where needed.

• ◉

  Monitoring

  Oct 23 · 12:17 AM Notion

  We are aware of the security issue involving eMudhra, a third-party certificate authority used to verify secure internet connections. Our security and engineering teams assessed potential exposure and proactively updated affected software and certificate bundles across our services and applications. We did not find any evidence that Notion has been compromised in connection with this issue.

• ✓

  Resolved

  Oct 26 · 6:23 PM Notion

  Please visit our Security Advisories page at <https://www.notion.com/security/advisories> for any future updates.