Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
-
AccessLure victim to malicious web page
-
DeliveryDeliver crafted HTML to browser
-
ExploitTrigger improper input validation flaw
-
ExecutionExecute arbitrary code within sandbox
-
ImpactChain with escape for full compromise
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V2 - Validation and Business Logic Input validation, allowlisting
|
| Exploitation Conditions | Exploitation requires a victim using Google Chrome prior to 156.0.8078.47 to actively load attacker-controlled crafted HTML (navigate to a malicious or compromised page), per UI:R - there is no server-side or passive trigger. No authentication or special configuration is needed (PR:N, default configuration affected), which broadens exposure. The key LIMITING factor is that resulting code execution is confined to the renderer/browser sandbox per the description, so standalone impact on the host is contained unless combined with an additional sandbox-escape vulnerability; user interaction (visiting the page) is also mandatory. |
| Impact | The supplied CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, base 8.8) indicates a network-reachable, low-complexity flaw needing no privileges but requiring user interaction - consistent with the description of exploitation via a crafted HTML page that a victim must visit. However, two signals conflict with the raw score: the description states code execution occurs 'inside the sandbox' (not a sandbox escape), and Google/Chromium rated the security severity only 'Medium'. This strongly suggests real-world impact is constrained by Chrome's sandbox, so a single bug of this class typically must be chained with a sandbox-escape to achieve host compromise - the 8.8 overstates standalone risk. No EPSS score, CISA KEV listing, or POC indicator was provided, so there is no evidence of active exploitation or public exploit code. Net assessment: a legitimately patch-worthy browser RCE primitive, but absent KEV/POC/EPSS signals it is a routine high-priority browser-update item rather than an emergency; the sandbox containment and Medium vendor rating argue against treating it as a weaponized, widely-exploited threat. |
| Exploit ScenarioDerived | An attacker hosts or compromises a web page containing crafted HTML that triggers the improper input validation in Chrome's Browser component, and lures a victim (via link, ad, or malvertising) to visit it. When the page loads in an unpatched Chrome (prior to 156.0.8078.47), the flaw yields arbitrary code execution confined to the renderer sandbox. No public exploit was identified in the provided data; real-world host compromise would require chaining this with a separate sandbox-escape bug. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAIv1 – Oct 21, 2026
Google Chrome before 156.0.8078.47 contains an improper input validation flaw that can let a remote attacker who convinces a victim to load a crafted HTML page potentially execute arbitrary code inside the browser sandbox. The issue is network-reachable, low-complexity, and requires no privileges, but exploitation depends on user interaction (visiting the malicious or compromised page); resulting execution is confined to the renderer/browser sandbox unless chained with a separate sandbox escape. No public exploit code or CISA KEV entry was identified at time of analysis.
RemediationAI
Upgrade Google Chrome to 156.0.8078.47 or later using the browser's auto-update mechanism or the vendor-provided package, then restart Chrome and verify the installed version via chrome://version. Enterprises should enforce the minimum version through browser management policies and prioritize users with broad web exposure. The vendor advisory is available at https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_02018666648.html with tracking at https://issues.chromium.org/issues/553153823. If immediate upgrade is not possible, restrict browsing to trusted sites and block known malicious domains as a temporary compensating control, recognizing that this is incomplete because the flaw is triggered by ordinary page rendering; additional isolation or sandbox hardening may reduce residual risk but does not replace the patched build.
Affected VersionsENISA
Affected Packages
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 root cause is CWE-20 improper input validation in Chrome's handling of crafted HTML content, which can lead to code execution within the browser's sandboxed renderer rather than on the host directly. The supplied CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) reflects a remote, low-complexity attack requiring no authentication but mandatory user interaction, consistent with a victim navigating to an attacker-controlled page. Chromium rates the issue Medium, while the CVSS base score is 8.8 because of high confidentiality, integrity, and availability impact within the sandboxed context; no CPE strings were provided, so exact platform coverage should be confirmed against the Chrome release advisory.
Know when the next one hits your stack
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network-delivered crafted HTML (AV:N/AC:L) needing no privileges but victim navigation (PR:N/UI:R); sandbox-confined code execution keeps scope unchanged (S:U) with high C/I/A within the process.
Primary rating from Vendor (google).
CVSS VectorVendor: google
Lifecycle Timeline
3DescriptionCVE.org
Improper input validation in Browser 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: Medium)
Executive ViewAI
Google Chrome installations below version 156.0.8078.47 carry a high-severity input-validation flaw that lets a crafted web page run attacker-controlled code inside the browser sandbox on an affected endpoint. Because exposure depends only on an employee visiting a malicious or compromised site, every unpatched browser in the corporate fleet is a potential entry point rather than an isolated technical issue. Execution is contained by the renderer sandbox unless paired with a separate escape, so leadership should treat this as a fleet-wide patching and browser-hygiene priority.
Apply vendor patch.
Threat Intelligence Overview
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.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
EUVD-2026-105616
GHSA-7f5p-v38x-xpr5
NVD
CVE.org
EPSS
Exploit-DB