Heap Buffer Overflow in PDFium Enables Remote Code Execution

Publication date: 2026-04-15

Last updated on: 2026-05-27

Assigner: Chrome

Description

Heap buffer overflow in PDFium in Google Chrome prior to 147.0.7727.101 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted PDF file. (Chromium security severity: High)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-04-15

Last Modified

2026-05-27

Generated

2026-07-06

AI Q&A

2026-04-16

EPSS Evaluated

2026-07-05

NVD

CVE-2026-6305

EUVD

EUVD-2026-23052

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 147.0.7727.101 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability is a heap buffer overflow in PDFium, a component used in Google Chrome versions prior to 147.0.7727.101. It allows a remote attacker to execute arbitrary code inside a sandbox by using a specially crafted PDF file.

Impact Analysis

The vulnerability can lead to remote code execution within the sandbox environment of Google Chrome. This means an attacker could potentially run malicious code on your system by tricking you into opening a crafted PDF file, which could compromise your data, privacy, or system integrity.

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