A critical vulnerability in Fortinet's FortiPAM Chrome extension, tracked as CVE-2026-84388 and rated CVSS 9.1, allowed a malicious website to register itself as a trusted FortiPAM server and invoke the privileged-access extension without valid JWT authentication. FortiPAM is a privileged-access-management component reported to have more than one million users.
An attacker could provide a malicious privileged-session configuration that changed the browser proxy, opened an attacker-selected tab, automatically approved the extension's consent prompt, and streamed recordings of that tab to an attacker-controlled server. The flaw enabled low-effort phishing and exposure of sensitive content, including API keys, viewed in the opened tab; it was reported July 17 and fixed August 1, with no known in-the-wild exploitation reported.

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Fortinet patched CVE-2026-84390, a CVSS 9.6 FortiMonitorOnSight web-portal flaw that could allow remote unauthenticated attackers to bypass authentication with forged or reused JSON Web Tokens. Fortinet said none of the vulnerabilities addressed in the release were known to be exploited in the wild.
Fortinet released a fix for the FortiPAM Chrome extension flaw and published advisory FG-IR-26-168. The vulnerability could let a malicious site alter the browser proxy, open an attacker-selected tab, approve consent, and stream recordings to an attacker-controlled server.
Researchers reported CVE-2026-84388, a CVSS 9.1 flaw allowing an arbitrary website to become a trusted FortiPAM server, invoke the extension, and provide a malicious privileged-session configuration.
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