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Google Chrome CVE-2026-113260

| EUVDEUVD-2026-105733 HIGH
Buffer Overflow (CWE-119)
2026-10-20 chrome-cve-admin@google.com GHSA-p4m8-rx86-wjjw
8.8
CVSS 3.1 · Vendor: google
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Lure victim to crafted HTML page
  2. Exploit
    Page triggers memory corruption in Chrome Core
  3. Execution
    Overflow corrupts renderer memory
  4. Impact
    Execute arbitrary code within sandbox

Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, buffer size validation
MITRE ATT&CK

2 techniques across 2 tactics: Execution, Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires a victim to actively open or render an attacker-crafted HTML page in a vulnerable Chrome build (any version prior to 156.0.8078.47); this user-interaction requirement (CVSS UI:R) is the primary limiting factor. No authentication or special configuration is needed, and default Chrome configurations are affected. A critical LIMIT is that the description scopes code execution to 'inside the sandbox' - the renderer process - so a successful attacker remains confined and would need a chained sandbox-escape vulnerability to compromise the underlying OS or access data outside the renderer.

Impact

The input CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, base 8.8) describes a network-reachable, low-complexity, unauthenticated memory-corruption flaw requiring only that a victim open a crafted HTML page - a classic drive-by browser profile. However, two signals pull the real-world priority DOWN and directly conflict with the 8.8 base score: (1) Google/Chromium explicitly rated this 'security severity: Low', and (2) the description states code execution occurs 'inside the sandbox', meaning a successful attacker is confined to the renderer process and would need a separate sandbox-escape bug to reach the host - a limitation the CVSS vector does not capture (CVSS keeps S:U and C/I/A:H for in-sandbox compromise). No EPSS score, no CISA KEV listing, and no public POC were provided in the input, so there is no evidence of active exploitation or weaponization. Net assessment: patch on the normal Chrome auto-update cadence, but this is a high-CVSS / low-real-risk item for most environments - the vendor's own 'Low' rating plus sandbox confinement make it far less urgent than the 8.8 number implies. Verify: the 8.8 base score and the vendor 'Low' severity are in tension; the sandbox-confined impact is the likely reason and should be weighed over the raw CVSS number.

Exploit ScenarioDerived

An attacker hosts a malicious web page (or injects malicious content into a compromised/ad-served page) that triggers the memory-corruption bug in Chrome's Core component when rendered. A victim simply visiting the page could have attacker-controlled code executed within the browser's sandboxed renderer process; full host compromise would additionally require a separate sandbox-escape vulnerability. No public exploit code was identified in the provided data.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 21, 2026

Memory corruption in the Core component of Google Chrome versions prior to 156.0.8078.47 allows remote attackers to potentially execute arbitrary code inside the renderer sandbox when a victim opens a crafted HTML page. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R, base 8.8) reflects a drive-by profile: no authentication or special configuration is required, but exploitation hinges on user interaction (UI:R), and the description explicitly confines code execution to 'inside the sandbox' - so an attacker remains limited to the renderer process and would need a chained sandbox escape to affect the underlying OS. No public exploit code or confirmed active exploitation was identified in the provided intelligence at time of analysis, and Chromium's own severity rating for this issue is Low despite the 8.8 base score.

RemediationAI

Vendor-released patch: upgrade Google Chrome to version 156.0.8078.47 or later, distributed via the Stable Channel update described at https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_02018666648.html; Chrome's own updater will normally apply this automatically, but managed fleets should force the update and verify the reported version. Chromium-based browsers and embedded Chromium frameworks must ship the equivalent upstream fix, so confirm each vendor's build number rather than assuming compatibility. As a compensating control pending rollout, enforce site isolation and keep the renderer sandbox enabled (disabling it removes the primary containment boundary that limits this bug to the renderer process), restrict or disable untrusted web content for high-value browsing profiles via allow-listing, and consider blocking known-bad domains at the proxy - though URL filtering has limited value against a bug reachable from arbitrary attacker-hosted pages and adds operational overhead. Because exploitation requires the victim to open a crafted page, reducing unnecessary browsing in privileged contexts lowers exposure, but patching remains the only complete fix.

Affected VersionsENISA

Chrome 156.0.8078.47 <156.0.8078.47

Affected Packages

euvd chrome fix: 156.0.8078.47

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The flaw is a memory-corruption issue (CWE-119: improper restriction of operations within the bounds of a memory buffer) in Chrome's Core component, the shared rendering and browser-engine code that parses and processes web content. Bounds errors of this class typically arise from insufficient length or index validation on attacker-controlled input during HTML parsing and layout, allowing an out-of-bounds write or read that can be shaped into controlled memory corruption. Because the bug is reachable purely through a crafted HTML page, it follows the classic browser exploitation model: the renderer must first be compromised, then a separate sandbox-escape primitive is required to break out of Chrome's process isolation. CPE data was not supplied; EUVD lists affected builds as Chrome releases below 156.0.8078.47, and the vendor advisory is the October 2026 Stable Channel update for desktop. Chromium's 'Low' severity label indicates exploitation is considered difficult or requires unusual conditions, which tempers the high base score.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (google) PRIMARY 8.8 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vuln.today AI 8.8 HIGH

Remote crafted page with no auth gives AV:N/AC:L/PR:N, victim must open the page so UI:R; code runs in the sandbox with no scope change (S:U) but full renderer-context C/I/A:H.

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

Primary rating from Vendor (google).

CVSS VectorVendor: google

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
CVSS changed
Oct 20, 2026 - 23:23 NVD
8.8 (HIGH)
Patch available
Oct 20, 2026 - 23:20 EUVD
CVE Published
Oct 20, 2026 - 22:19 cve.org
HIGH 8.8

DescriptionCVE.org

Memory corruption in Core in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Low)

Executive ViewAI

Why It Matters

Google Chrome releases before 156.0.8078.47 carry a memory-corruption flaw that can be triggered when a user opens a crafted web page, with potential code execution confined to the renderer sandbox unless a separate sandbox escape is chained. No public exploit has been identified at time of analysis, so immediate business exposure is concentrated in unpatched browser fleets and users who browse untrusted content. Leadership should care because browser compromise can affect productivity and data handling even when containment reduces operating-system impact.

Business Impact: Medium
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.4%
Top 68% exploitable
Prevalence
Ubiquitous
Google Chrome is the dominant desktop browser, present in most environments
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.4%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
Medium

Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +44
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

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