CVE-2026-6361Network attack vectorHinoki check available

Sandboxed code execution via PDFium heap overflow

Published Apr 15, 2026 · Updated May 26, 2026

Heap buffer overflow in PDFium in Google Chrome on Windows before 147.0.7727.101 allows remote attackers to execute code via a crafted PDF. Google identifies PDFium as the affected component but has not disclosed the vulnerable function or the precise operation that overflows a heap allocation. Exploitation requires the user to perform specific UI gestures, and the reported code execution remains inside the browser sandbox.

CVSS severity8.3
High
EPSS probability0.38%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Heap buffer overflow in PDFium in Google Chrome on Windows before 147.0.7727.101 allows remote attackers to execute code via a crafted PDF. Google identifies PDFium as the affected component but has not disclosed the vulnerable function or the precise operation that overflows a heap allocation. Exploitation requires the user to perform specific UI gestures, and the reported code execution remains inside the browser sandbox.

The record

CVE
CVE-2026-6361
Published
Apr 15, 2026
Updated
May 26, 2026
Vendor
WebM Project
Product
Chrome
Classifications
CWE-122, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 2026CVE publishedPublication date reported by the CVE source.
  2. May 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected version<147.0.7727.101

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WebM Project · Chrome<147.0.7727.101

Published CVSS scores

8.3CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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