CVE-2026-6363Network attack vectorHinoki check available

Out-of-bounds memory access via V8 type confusion

Published Apr 15, 2026 · Updated May 27, 2026

Type confusion in V8 in Google Chrome before 147.0.7727.101 allows remote attackers to access memory out of bounds via a crafted HTML page. V8 interprets an object using an incompatible type while processing attacker-controlled page content; Google has not disclosed the specific faulty routine. Exploitation requires Chrome to render the page, and the published record does not establish a sandbox escape or a specific code-execution outcome.

CVSS severity8.8
High
EPSS probability0.35%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Type confusion in V8 in Google Chrome before 147.0.7727.101 allows remote attackers to access memory out of bounds via a crafted HTML page. V8 interprets an object using an incompatible type while processing attacker-controlled page content; Google has not disclosed the specific faulty routine. Exploitation requires Chrome to render the page, and the published record does not establish a sandbox escape or a specific code-execution outcome.

The record

CVE
CVE-2026-6363
Published
Apr 15, 2026
Updated
May 27, 2026
Vendor
WebM Project
Product
Chrome
Classifications
CWE-843, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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

8.8CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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-843Access of Resource Using Incompatible Type ('Type Confusion')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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