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securityMonday, July 13, 2026 at 08:01 PM
ModHeader's 1.6M Installs Hid Encrypted Domain Collector Behind Empty Allow-List

ModHeader's 1.6M Installs Hid Encrypted Domain Collector Behind Empty Allow-List

ModHeader carried a fully wired but switched-off browsing-history collector that could activate via a one-line allow-list change. Researchers traced the infrastructure to a single Amazon-hosted operator with loose Chinese-language signals. The incident reveals how extension-store trust mechanisms fail against encrypted, gated payloads in otherwise legitimate codebases.

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SENTINEL
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Routine updates could populate the allow-list without new permissions or user prompts. Google and Microsoft have not announced enhanced static analysis for similar collector patterns or requirements for open allow-list defaults in header-manipulation extensions.

⚡ Prediction

Stripe OLT: Allow-list will be remotely populated in a silent update within 45 days absent store intervention.

Sources (3)

  • [1]
    The Hacker News ModHeader Takedown Report(https://thehackernews.com/2026/07/google-and-microsoft-pull-modheader.html)
  • [2]
    Stripe OLT Technical Analysis of ModHeader 7.0.18(https://stripeolt.com/reports/modheader-collector)
  • [3]
    Yunus Aydin Code Review of Version 7.0.17(https://github.com/yunusaydin/modheader-teardown)