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CVE-2026-6305 is a high-severity heap buffer overflow in PDFium affecting Google Chrome versions prior to 147.0.7727.101. The flaw can be triggered by a crafted PDF document and allows a remote attacker to achieve arbitrary code execution within Chrome’s sandboxed renderer context. The issue is in the PDFium component used for PDF processing, and the vulnerability arises from improper bounds handling on heap-allocated memory during PDF parsing or rendering, leading to memory corruption.
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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.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A heap buffer overflow vulnerability in PDFium in Google Chrome that allows remote code execution inside the browser sandbox via a crafted PDF file.
A high-severity heap buffer overflow vulnerability in PDFium in Google Chrome.
A high-severity heap buffer overflow vulnerability in Chrome's PDFium component, mentioned as a possible renderer-compromise precursor in an exploit chain.
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.