AnalysisPublished 29 Jun 2026

Chromium extension uses AI‑related branding to redirect browser search

Source Microsoft Security Blog

Description

A malicious Chromium-based extension that spoofs the AI-powered answer engine Perplexity AI redirects browser search traffic using MV3 APIs and intermediary infrastructure. The post Chromium extension uses AI‑related branding to redirect browser search appeared first on Microsoft Security Blog .

Impact

Users installing this malicious extension may have their browser search traffic redirected without consent, which can lead to exposure to unwanted or potentially harmful content and undermine user trust in legitimate AI-powered services. There is no evidence of exploitation beyond redirection or of broader system compromise.

Defensive guidance

Users should avoid installing untrusted Chromium extensions, especially those impersonating known AI services. Review installed extensions and remove any suspicious or unrecognized ones. Monitor official vendor advisories for updates or fixes related to this threat.

References

microsoft.com/en-us/security/blog/2026/06/29/chromium-extension-uses-airelated-branding-redirect-browser-search/ (opens in a new tab)

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Description

AI analysisMachine-generated, updated 30 Jun 2026, 00:10 UTC

References

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