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#2 SecurityWeek general September 18, 2026 at 09:46 UTC

Brevo Supply Chain Attack Injects Malware Into 100,000 Websites

By Ionut Arghire

AI Summary

A supply chain attack against email marketing platform Brevo used a compromised API key to deploy a malicious Cloudflare Worker that injected malicious scripts into approximately 100,000 websites. The attack demonstrates how a single compromised vendor credential can cascade into mass website compromise, affecting downstream visitors of all affected sites.

Read full article → https://www.securityweek.com/brevo-supply-chain-at…

Relevance score: 85.0/100

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