Use After Free in PDFium in Google Chrome

Publication date: 2026-05-28

Last updated on: 2026-06-01

Assigner: Chrome

Description

Use after free in PDFium in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to potentially exploit heap corruption via a crafted PDF file. (Chromium security severity: High)

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-05-28

Last Modified

2026-06-01

Generated

2026-07-09

AI Q&A

2026-05-29

EPSS Evaluated

2026-07-08

NVD

CVE-2026-9958

EUVD

EUVD-2026-33100

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 148.0.7778.216 (exc)
google	chrome	to 148.0.7778.215 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This vulnerability is a use-after-free issue in PDFium, a component of Google Chrome, in versions prior to 148.0.7778.216. It allows a remote attacker to potentially cause heap corruption by using a specially crafted PDF file.

Impact Analysis

The vulnerability can allow a remote attacker to exploit heap corruption, which may lead to arbitrary code execution or a crash of the browser when processing a malicious PDF file.

Hi! I’m here to help you understand CVE-2026-9958. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70