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Google Chrome CVE-2026-106228

| EUVDEUVD-2026-93729 HIGH
Unintended Proxy or Intermediary ('Confused Deputy') (CWE-441)
2026-10-06 Chrome GHSA-wp9q-4597-rrj8
8.3
CVSS 3.1 · Vendor: Chrome
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Attack ChainAIDerived

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

  1. Access
    Compromise Chrome renderer process
  2. Delivery
    Lure victim to crafted HTML page
  3. Exploit
    Abuse Google Lens confused deputy
  4. Execution
    Escape renderer sandbox
  5. Impact
    Execute arbitrary code on host

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V4 - API and Web Service Proxy/intermediary controls
Exploitation Conditions

Exploitation is gated by a hard precondition explicitly stated in the description: the attacker must FIRST have compromised the Chrome renderer process (e.g., via a separate renderer-stage bug) - this is not a standalone remote exploit. Given that foothold, the attacker then needs the victim to load a crafted HTML page (UI:R / user interaction required), and the specific affected component is the Google Lens feature acting as a confused deputy (CWE-441) to perform a privileged operation that crosses the sandbox boundary. Limiting factors: the required renderer compromise and user interaction, combined with high attack complexity (AC:H), mean this cannot be triggered against a default install without a prior exploitation stage; only Chrome versions prior to 155.0.8059.39 are affected, and updating resolves it.

Impact

This is a genuine high-value issue but not an immediate fire-drill, and the signals are internally consistent rather than conflicting. The CVSS 3.1 base score of 8.3 (AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H) is driven up by the scope change (S:C) inherent to a sandbox escape and by total CIA impact, but it is tempered by high attack complexity (AC:H) and required user interaction (UI:R). Critically, the description establishes that this is a second-stage vulnerability: the attacker must have ALREADY compromised the Chrome renderer process before this confused-deputy flaw (CWE-441) in Google Lens can be abused to execute code outside the sandbox. This aligns with Chromium's own 'Medium' security severity rating, which is lower than the 8.3 would suggest in isolation. The SSVC framework reinforces a measured posture: Exploitation=none (no observed activity), Automatable=no (cannot be mass-weaponized), but Technical Impact=total (full sandbox escape if chained). There is no CISA KEV listing and no public POC, so there is no public exploit identified at time of analysis. EPSS was not provided in the input and so cannot be weighed. Bottom line: prioritize patching because the affected product (Chrome) is ubiquitous and a vendor fix exists, but the practical barrier - needing a pre-existing renderer compromise plus user interaction plus high complexity - means this is a chain component for sophisticated actors, not a widely sprayable standalone exploit.

Exploit ScenarioDerived

An attacker first achieves code execution inside Chrome's renderer process (typically by chaining a separate renderer RCE bug), then lures the victim to a crafted HTML page that abuses the Google Lens component as a confused deputy to perform privileged actions on the attacker's behalf, escaping the sandbox to run arbitrary code with browser-process privileges. No public exploit code or active exploitation has been identified for this specific CVE; exploitation requires the complex precondition of an already-compromised renderer, consistent with the CVSS AC:H and UI:R metrics.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 06, 2026

Sandbox escape and potential arbitrary code execution outside the browser sandbox in Google Chrome via a confused-deputy flaw in the Google Lens feature, affecting all desktop releases prior to 155.0.8059.39. Exploitation is not standalone: a remote attacker must first have compromised the Chrome renderer process (a separate renderer-stage bug), then convince the victim to load a crafted HTML page, after which the Lens component can be induced to perform a privileged operation that crosses the sandbox boundary on the renderer's behalf - consistent with the CVSS:3.1 vector AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H and high attack complexity. No public exploit code has been identified at time of analysis and there is no confirmed active exploitation (CISA KEV absent, SSVC exploitation: none), but the maximum technical impact rating means the issue is worth prioritizing within normal patch cycles; vendor-released patch: 155.0.8059.39.

RemediationAI

Primary fix: upgrade Google Chrome to 155.0.8059.39 or later - vendor-released patch: 155.0.8059.39 - which resolves the confused-deputy path in Google Lens; confirm the running build at chrome://version and force the update on managed fleets via Google Update/Chrome Browser Cloud Management (allow auto-update, then prompt for browser restart so the new binary actually loads). Because exploitation additionally requires a prior renderer compromise, hardening the renderer stage is also valuable: keep Site Isolation enabled by default, avoid relaxing it with flags, and restrict users from loading untrusted HTML in the same profile used for sensitive sessions. If immediate fleet-wide patching is impossible, a targeted compensating control is to disable the Google Lens overlay through enterprise policy (LensOverlaySettings set to 0), which removes the specific deputy component this CVE abuses at the cost of losing the Lens feature for end users; policies that block the feature on managed devices reduce exposure but do not remove the underlying renderer attack surface, and no other mitigation is a substitute for installing 155.0.8059.39. Detailed vendor guidance is at https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_086471744.html, with technical tracking at https://issues.chromium.org/issues/517689673.

Affected VersionsENISA

Chrome 155.0.8059.39 <155.0.8059.39

Affected Packages

euvd chrome fix: 155.0.8059.39

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 class is CWE-441 (Confused Deputy): Google Lens, a privileged Chrome component that brokers actions on behalf of page content, fails to properly validate the authority of the caller and can be tricked into exercising its own elevated privileges for an unprivileged renderer. In Chrome's multi-process architecture the renderer is sandboxed; this bug provides a pathway for a renderer that has already been compromised - for example by a separate memory-corruption bug - to pivot out of the sandbox via the Lens surface, which is why the CVSS vector carries scope-changed (S:C) with high confidentiality, integrity and availability impact. The vector also shows network attack vector (AV:N) and no privileges required (PR:N), meaning the flaw is reachable unauthenticated, but user interaction (UI:R) is mandatory because the victim must load a crafted HTML page, and attack complexity is rated high (AC:H) precisely because a prior renderer compromise is a hard precondition. CPE data confirms the affected platform is Google Chrome (cpe:2.3:a:google:chrome), and the EUVD entry lists the fix as Chrome 155.0.8059.39, with all earlier builds in the affected range.

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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-delivered crafted page (AV:N) with user interaction (UI:R); AC:H and PR:N reflect the non-privileged but complex precondition of a pre-compromised renderer, and S:C/C:H/I:H/A:H capture the full sandbox escape.

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:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Red Hat 6.5 MEDIUM

Primary rating from Vendor (Chrome).

CVSS VectorVendor: Chrome

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

Lifecycle Timeline

4
CVSS changed
Oct 06, 2026 - 21:22 NVD
8.3 (None) 8.3 (HIGH)
Patch available
Oct 06, 2026 - 20:04 EUVD
CVE Published
Oct 06, 2026 - 18:41 cve.org
UNKNOWN (no severity yet)
CVE Published
Oct 06, 2026 - 18:41 cve.org
HIGH 8.3

DescriptionCVE.org

Confused deputy in Google Lens in Google Chrome prior to 155.0.8059.39 allowed a remote attacker who had compromised the renderer process to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

Executive ViewAI

Why It Matters

Organizations using Google Chrome on desktop are affected by a high-severity sandbox escape vulnerability in the Google Lens component, requiring version 155.0.8059.39 or later to remediate. While no public exploit code or active exploitation has been identified, successful exploitation could allow an attacker to execute arbitrary code outside the browser sandbox, leading to potential endpoint compromise and data loss. Leadership should prioritize patching within standard cycles given the high technical impact and widespread use of Chrome.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.3%
Top 76% exploitable
Prevalence
Ubiquitous
Google Chrome is the dominant browser across consumer and enterprise endpoints
Data Quality
7 sources
Confidence: High

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 0.3%
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
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact
High
Technical Impact
Total

Priority Score

42
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +42
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

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

Vendor StatusVendor

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