What to Rotate First: Hosting, Payments, Database, and CI Secrets
If an advisory says “rotate credentials,” most damage is prevented by tackling the highest-impact keys first—not by alphabetizing your .env file. This is a simple priority order you can hand to any engineer who does not live in security tooling: what to hit today, what can wait until tomorrow, and where people usually forget keys (CI, preview envs, laptops).
Key Insights
P0 same day: anything that can move money (STRIPE_SECRET_KEY, payment webhooks), anything that bypasses normal access control (SUPABASE_SERVICE_ROLE_KEY, DB admin URLs), and identity that unlocks other systems (OAuth client secrets, SSO SAML certs if applicable).
P1 soon: production API keys for data exfiltration risk (S3, email-as-infrastructure), third-party SaaS with broad scopes, and hosting (Vercel) env vars that mirror those secrets—update Vercel after the vendor issues the new value, then redeploy.
P2 scheduled: read-only analytics keys, feature flags, non-production sandboxes—still rotate, but not at 2 a.m. unless the advisory names them.
Forgotten spots: GitHub Actions / GitLab CI repository secrets, Terraform Cloud variable sets, preview deployments on Vercel, cron workers on other clouds, and every developer’s .env.local.
Always: generate at vendor → update Vercel (and CI) → redeploy → test → revoke old key at vendor. Deleting a Vercel project does not revoke Stripe or AWS keys.
Start with money and impersonation risk
Rotate Stripe (or PayPal, Paddle, etc.) secret keys and webhook signing secrets first if they appear in the affected hosting account. Test checkout and webhook delivery immediately after. If you only have time for three keys tonight, pick payment secret, payment webhook secret, and database URL or service role.
Then data plane and admin APIs
Database passwords, Supabase service role, Redis auth strings, and backup credentials come next—they often grant read/write across customer data. Rotate the credential in the database or SaaS console, update connection strings in Vercel for every environment that uses them, redeploy, run migrations or health checks, then revoke the old password.
Then hosting and front-end public keys
Update Vercel environment variables to match whatever you generated upstream. Redeploy production and, if you use them, preview. For NEXT_PUBLIC_* keys remember a rebuild may be required. Mark sensitive server keys as Sensitive in Vercel when available.
Then CI, scripts, and laptops
Search your org for repository secrets, reusable workflows, and deployment keys. grep or your IDE’s global search for the old key prefix (e.g. sk_live_, whsec_) across repos—carefully, without pasting secrets into tickets. Ask the team to refresh .env.local from a password manager or vercel env pull, not from Slack.
Communicate one short internal note
Post: which systems were updated, which variable names changed, whether old keys are revoked, and what engineers must pull locally. That reduces duplicate work and prevents someone from reintroducing a revoked key from an old branch screenshot.
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