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Google Chrome CVE-2026-78934

| EUVDEUVD-2026-65775 HIGH
Race Condition (CWE-362)
2026-08-25 Chrome GHSA-v4v8-rm8r-mf7f
8.3
CVSS 3.1 · Vendor: Chrome
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Severity by source

Vendor (Chrome) PRIMARY
8.3 HIGH
AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
vuln.today AI
8.3 HIGH

Network delivery requires user interaction and precise race-condition timing (AC:H); sandbox escape justifies S:C and full C/I/A:H impact.

3.1 AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
4.0 AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Primary rating from Vendor (Chrome).

CVSS VectorVendor: Chrome

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Analysis Generated
Aug 26, 2026 - 19:31 vuln.today
CVSS changed
Aug 26, 2026 - 17:23 NVD
8.3 (HIGH)
CVE Published
Aug 25, 2026 - 20:10 cve.org
UNKNOWN (no severity yet)
CVE Published
Aug 25, 2026 - 20:10 cve.org
HIGH 8.3

DescriptionCVE.org

Race condition in ReadAloud in Google Chrome prior to 152.0.7977.65 allowed a remote attacker leveraging social engineering to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)

AnalysisAI

Race condition in Chrome's ReadAloud component allows remote code execution inside the browser sandbox when a user is socially engineered into visiting a crafted HTML page. Affected are all Google Chrome builds prior to 152.0.7977.65 across desktop platforms. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Recon
Craft malicious HTML page targeting ReadAloud
Delivery
Deliver link via phishing or malvertising
Exploit
User opens page in unpatched Chrome
Install
Race condition triggered in ReadAloud renderer thread
C2
Attacker wins timing window, corrupting shared state
Execute
Execute arbitrary code inside renderer sandbox
Impact
Leverage scope change to escape sandbox and impact host

Vulnerability AssessmentAI

Exploitation Exploitation requires the target user to visit a crafted HTML page, meaning successful social engineering (phishing, malvertising, or drive-by via a compromised trusted site) is a hard prerequisite - reflected in CVSS UI:R. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 8.3 reflects a serious but practically constrained threat: AV:N confirms internet-reachable delivery, but AC:H acknowledges that race condition exploitation requires precise timing and is difficult to trigger reliably. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker hosts a crafted HTML page that, when rendered by Chrome's ReadAloud component, triggers a race condition between two concurrent execution paths sharing unsynchronized state. The attacker distributes the link via phishing or malvertising to lure a target into visiting the page, after which the race condition is won to corrupt or redirect execution flow, achieving arbitrary code execution within the Chrome renderer sandbox - and potentially escaping it given the S:C metric.
Remediation The primary fix is to upgrade Google Chrome to version 152.0.7977.65 or later, as confirmed by the vendor's Stable Channel update advisory at https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Notify users of the patch availability and enforce update initiation; verify that your Chrome update distribution mechanisms (auto-update, MDM, or Group Policy) are properly configured. …

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CVE-2026-78934 vulnerability details – vuln.today

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