CVE-2026-78952Network attack vector

Sandbox escape via Crashpad out-of-bounds write

Published Aug 25, 2026 · Updated Aug 25, 2026

Out-of-bounds write in Google Chrome Crashpad before 152.0.7977.65 on Windows allows remote attackers to escape the sandbox with code execution. Google identifies Crashpad as the locus and an out-of-bounds write as the faulty operation, but the restricted issue does not expose the affected routine or buffer. Exploitation requires a crafted HTML page and prior renderer-process compromise; success executes arbitrary code outside the sandbox on Windows.

CVSS severity8.3
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Google Chrome Crashpad before 152.0.7977.65 on Windows allows remote attackers to escape the sandbox with code execution. Google identifies Crashpad as the locus and an out-of-bounds write as the faulty operation, but the restricted issue does not expose the affected routine or buffer. Exploitation requires a crafted HTML page and prior renderer-process compromise; success executes arbitrary code outside the sandbox on Windows.

The record

CVE
CVE-2026-78952
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-787, T1068
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 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 versionversion=152.0.7977.65 <152.0.7977.65

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=152.0.7977.65 <152.0.7977.65

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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1068Exploitation for Privilege Escalation

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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