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CVE-2026-6361 is a high-severity heap-based buffer overflow in PDFium, the PDF rendering engine used by Google Chrome. The flaw affects Google Chrome on Windows prior to version 147.0.7727.101 and is triggered while processing a crafted PDF document, where PDFium writes more data into a heap-allocated buffer than the buffer can hold. This memory corruption condition can overwrite adjacent heap structures and enable control-flow manipulation within the browser renderer context. Exploitation requires a remote attacker to deliver a malicious PDF and convince the target user to open it in Chrome and engage in specific UI gestures. Successful exploitation results in arbitrary code execution inside the Chrome sandbox.
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A high-severity heap buffer overflow vulnerability in PDFium in Google Chrome.
A heap-based buffer overflow in Google Chrome's PDFium PDF rendering engine that can allow remote code execution within the Chrome renderer sandbox when a user opens a crafted PDF and performs specific UI gestures.
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.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.