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CVE-2026-91732 is a medium-severity missing-authorization vulnerability in the AppManifest component of Google Chrome before version 153.0.8010.47. An attacker who has already compromised the Chrome renderer process can use a crafted HTML page and social engineering to bypass the browser's web origin policy.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Medium-severity missing-authorization vulnerability in Chrome AppManifest.
A Medium-severity missing-authorization vulnerability in Chrome AppManifest.
An authorization flaw in Google Chrome's AppManifest handling that can enable web-origin-policy bypass through a crafted HTML page, contingent on prior compromise of the renderer process and social engineering.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.