Sandbox escape via use-after-free in XR in Google Chrome on Windows
CVE-2026-9890 is a use-after-free vulnerability in the XR component of Google Chrome on Windows prior to 148.0.7778.216. According to the provided advisory text, a remote attacker who had already compromised the renderer process could trigger the flaw via a crafted HTML page and potentially escape Chrome's sandbox. The issue is classified by Chromium as Critical. Based on the available information, the bug is a memory-safety error in XR where freed memory may be reused, creating a path from renderer compromise to a higher-impact post-exploitation condition on Windows.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
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Remediation
Patch, then assume compromise.
Exploits
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No public exploit code observed for this vulnerability.
Affected products & vendors
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
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The version that knows your environment.
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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.