CTI · reviewed · 2026-09-23

Compromised marketing tool Brevo hits 100K+ websites via flawed SAML SSO exposing Cloudflare API key

Full story & timeline

MITRE ATT&CK

• T1195 Supply Chain Compromise Initial Access
• T1199 Trusted Relationship Initial Access

Indicators

No curated indicators tied to this case.

Detections

No detection content yet — case analysis did not yield signal-specific telemetry. Check back after the next daily CTI pass.

References

• https://buymeacoffee.com/sandeepraiza/one-compromised-marketing-tool-100-000-websites-infected-the-brevo-supply-chain-attack-explained