Incident Library
Applied filters Componentcert-managerFactorChange with a delayed effectOrganisationPortSwiggerClear allEvery case under the filters, with no sentence; newest first.
Suggested filters Search, and the values found in your words appear here.

Graph

  • Root cause
  • Component
  • Symptom
  • Contributing factor
  • Case

Cases1 case

1 to 1 of 1

  1. IL-0405 An expired AWS Load Balancer Controller webhook certificate left no healthy targets and took BSEE SaaS down
    PortSwigger2026
    Symptoms

    From 10:00 UTC on 11 January 2026 every BSEE SaaS instance in PortSwigger's US and Canada regions was unavailable: customers could not open the Web UI or start scans. The platform team learned of it only when customers reported it through support at 09:52 UTC the next day.

    Service outageTLS certificate errors
    Trigger

    The upgrade of the AWS Load Balancer Controller from v1.14.1 to v1.16.0 on 28 November 2025 left an orphaned webhook TLS secret that cert-manager could not renew, and the certificate in it expired on 8 January 2026.

    Root cause
    Breaking change in an upgrade
    Component
    Ingress controllerAdmission webhookcert-managerHelmConfigMaps and SecretsCloud load balancer
    Contributing factor
    Change with a delayed effectMonitoring blind spot
    Detection

    Customers reported the outage through support at 09:52 UTC on 12 January 2026, almost 24 hours after impact began, and the platform team began investigating at 10:00 UTC.

    Remediation
    • Deleted the orphaned aws-load-balancer-tls secrets in the US and Canada clusters
    • Redeployed the AWS Load Balancer Controller configuration with Helm
    • Verified that new certificates were generated and the webhooks worked again
    Action items
    • Audit all clusters for orphaned secrets that have no owning Certificate resource and resolve them
    • Add high-level application access alerting for each SaaS cluster from an external probe
    View case
Check your cluster for this

This case involves Admission webhook and cert-manager. kubegap audits a Kubernetes cluster for gaps like these, read-only, from Claude Code or Codex; its checks cite public reports like the ones in this library.

Open kubegap

By root cause1

Breaking change in an upgrade1 case

Component
Admission webhookcert-managerCloud load balancerConfigMaps and SecretsHelmIngress controller
Contributing factor
Change with a delayed effectMonitoring blind spot
Organisation
PortSwigger
  1. IL-0405 An expired AWS Load Balancer Controller webhook certificate left no healthy targets and took BSEE SaaS down
    PortSwigger2026