Kernel
San Francisco, United States2 sources
Confirmed:Confirmed by the organisation, a regulator or a securities filing. First reported 4 Nov 2026.
Kernel reports data breach affecting small percentage of customers
Kernel detected unauthorized access using compromised API keys that allowed an attacker to download data from its logging provider and access four GPU servers. The company confirmed the breach impacted 0.28% of its customers and has revoked the credentials and taken affected servers offline.
- Type
- Data breach
- Sector
- Technology
- First reported
- 4 Nov 2026
- Latest source
- 4 Nov 2026
What to do
- If you have an account, change that password, and anywhere you reused it.
- Turn on two-factor authentication, ideally an authenticator app or passkey, not SMS.
- Expect phishing that uses your real details. Do not click links in messages about this incident; go to the company's site directly.
- If payment cards were involved, watch statements and ask your bank for a new card.
- If government ID or social security numbers were involved, consider a credit freeze.
- If this is a vendor of yours, ask what of your data they held and whether it was in scope.
- Reset any API keys, SSO trusts or shared credentials you have with them.
- Brief your help desk: attackers often impersonate the breached brand next.
Not sure? Ask an assistant with the sources attached, or have a coding agent check your systems.
Check your systems for Kernel
Sources
2- kernel.sh4 Nov 2026kernel.sh/blog/public-notice-of-security-incident-nov-4-2026
- kernel.sh4 Nov 2026November 4, 2026 Public Notice of Security Incident | Kernel Blog
Confidence 70% that this is real and correctly placed. Locations are city centroids at best. Spotted an error? Report a correction.