malicious extensions

About this tag
Discussions on WindowsForum.com about malicious extensions focus on browser security vulnerabilities that allow extensions to bypass policies, corrupt memory, or steal session cookies. Topics include CVE-2026-5901, a Chrome DevTools policy bypass enabling cookie host modification, and CVE-2026-5914, a type confusion bug causing heap corruption via malicious extensions. The Cookie-Bite attack is also covered, where malicious extensions harvest authentication cookies from cloud services like Microsoft 365 and Azure. These threads highlight the risks of installing untrusted extensions and the gap between vendor severity ratings and real-world exploitability, particularly for enterprise environments relying on browser-based security controls.

  1. CVE-2026-14154 Chrome DevTools UI Spoofing: Patch, Extensions, and Metadata Mismatch

    Google Chrome CVE-2026-14154 is a DevTools UI-spoofing flaw disclosed June 30, 2026, affecting Chrome versions before 150.0.7871.47 and requiring an attacker to persuade a user to install a malicious Chrome extension. NVD lists the issue as sourced from Chrome, while CISA’s enrichment assigns a...
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    • chrome security devtools ui spoofing malicious extensions vulnerability management
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    • Forum: Security Alerts

  2. CVE-2026-13029 Chrome WebAuthn Use-After-Free: Patch & Extension Governance

    Google disclosed CVE-2026-13029 on June 24, 2026, as a high-severity use-after-free vulnerability in Chrome’s Web Authentication component affecting desktop versions before 149.0.7827.197, with exploitation requiring a user to install a malicious Chrome extension that could trigger heap...
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    • chrome security malicious extensions webauthn passkeys windows patching
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    • Forum: Security Alerts

  3. CVE-2026-5901: Chrome DevTools Policy Bypass Lets Extensions Modify Cookie Hosts

    Insufficient policy enforcement in Chrome DevTools is back in the spotlight with CVE-2026-5901, a newly published Chromium issue that could let a malicious extension bypass enterprise host restrictions for cookie modification in Google Chrome versions prior to 147.0.7727.55. The bug is rated Low...
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    • chrome devtools enterprise security malicious extensions policy bypass
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    • Forum: Security Alerts

  4. CVE-2026-5914 Chrome Type Confusion: Heap Corruption via Malicious Extensions

    Type confusion bugs in browser engines rarely stay theoretical for long, and CVE-2026-5914 is another reminder that the most dangerous path into a modern browser is often not the web page itself, but the extension ecosystem wrapped around it. Google says the flaw affected Chrome prior to...
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    • chrome security cve 2026 5914 malicious extensions type confusion
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    • Forum: Security Alerts

  5. Cookie-Bite Attack: Protecting Cloud Sessions from Stealth Browser Extension Threats

    A new browser-based threat dubbed the “Cookie-Bite” attack is capturing the cybersecurity community’s attention, raising major concerns over the integrity of authentication within cloud environments like Microsoft Azure, Microsoft 365, Google Workspace, AWS, and others. The discovery, recently...
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    • aws security browser permissions browser security cloud authentication cloud security cookiebite credential theft cybersecurity endpoint security extension security google workspace malicious extensions microsoft azure security awareness security best practices session cookies session hijacking session theft threat mitigation zero trust
    • Replies: 0
    • Forum: Windows News