Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAttacker registers domain and hosts crafted HTML page
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DeliveryDelivers link to victim via phishing or malvertising
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ExploitVictim clicks link in vulnerable Chrome (< 149.0.7827.103)
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ExecutionCrafted page triggers improper Guest View input handling
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PersistChrome renders spoofed UI elements
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ImpactVictim deceived into trusting malicious content or origin
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V2 - Validation and Business Logic Input validation, allowlisting
|
| Exploitation Conditions | User interaction is required - the victim must navigate to or be redirected to a crafted HTML page (CVSS UI:R). The CVSS vector confirms the attacker requires no authentication and no special network position (AV:N, PR:N, AC:L). The vulnerability is specific to Chrome's Guest View component, meaning it is most directly relevant to environments using webview-based Chrome features (e.g., Chrome Apps, Electron-derived wrappers that embed Chrome's webview). Exploitation is limited by the Unchanged scope (S:U), meaning an attacker cannot use this bug alone to escape the browser sandbox or access the host OS. The impact is constrained to limited confidentiality and availability effects (C:L, A:L, I:N), with no integrity compromise. The primary limiting factor for exploitation impact is that UI spoofing without code execution requires significant social engineering to translate into a meaningful breach. |
| Impact | The CVSS score of 5.4 (Medium) reflects a network-accessible, low-complexity attack requiring no privileges but needing user interaction (UI:R), with limited confidentiality (C:L) and availability (A:L) impact and no integrity impact (I:N). The Unchanged scope (S:U) means the vulnerability does not enable privilege escalation or sandbox escape. Compounding the moderate CVSS, the EPSS score of 0.05% places this at the 15th percentile - well below the threshold typically associated with active exploitation campaigns. There is no CISA KEV entry, and no public exploit code has been identified at time of analysis. The tags 'Information Disclosure' corroborate the limited confidentiality impact signal in the CVSS vector. Overall, this is a real but lower-priority issue: the attack surface is broad (any Chrome user visiting a malicious page) but the impact ceiling is low (UI deception, not code execution or data exfiltration), and exploitation probability is currently very low. |
| Exploit ScenarioDerived | An attacker registers a domain and serves a crafted HTML page that triggers the improper Guest View implementation in Chrome. When a victim running a vulnerable Chrome version visits the page (e.g., via a phishing link or malvertising), Chrome renders spoofed UI elements - such as a falsified address bar display or security badge - that make a malicious origin appear legitimate, potentially tricking the user into submitting credentials or trusting harmful content. No public exploit code has been identified at time of analysis, and no active exploitation has been reported. |
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Alert meAnalysisAIv1 – Jun 09, 2026
UI spoofing in Google Chrome's Guest View component prior to 149.0.7827.103 enables a remote unauthenticated attacker to deceive users about page content or origin by delivering a crafted HTML page. The CVSS vector (AV:N/AC:L/PR:N/UI:R) confirms exploitation requires no privileges and no special network position, but does require the victim to visit a malicious page. With an EPSS score of 0.05% at the 15th percentile and no CISA KEV listing, real-world exploitation is currently assessed as low probability, though the zero-friction delivery mechanism (a link) keeps the attack surface broad.
RemediationAI
Update Google Chrome to version 149.0.7827.103 or later, which contains the vendor-released patch for this issue. The official Stable Channel Update advisory is available at https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0153744567.html. Chrome's auto-update mechanism should apply this update automatically on most desktop installations; administrators managing enterprise fleets should verify deployment via Chrome Browser Cloud Management or equivalent policy tooling. No specific workaround is documented for this vulnerability. As a compensating control while updates are applied, organizations can restrict access to untrusted external URLs through web proxy filtering or DNS-based controls, which would reduce exposure by preventing users from reaching attacker-controlled pages - though this is impractical for general-purpose browsing environments and does not eliminate the vulnerability.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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Technical ContextAI · show details
Guest View is Chrome's internal framework for embedding isolated guest web content, primarily surfaced through the <webview> tag in Chrome Apps and Extensions. CWE-20 (Improper Input Validation) as the root cause indicates that inputs processed by the Guest View subsystem are not adequately validated or sanitized, allowing crafted HTML content to manipulate Chrome's rendered UI in unexpected ways. This class of bug typically allows an attacker to overlay or substitute UI elements - such as browser chrome, security indicators, or origin information - making malicious content appear trustworthy. The CVSS vector S:U (Unchanged scope) confirms the exploit is contained within the browser process rather than escaping to the underlying OS.
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Severity by source
Sources disagree (Medium–Critical)AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.
CVSS VectorVendor: google
Lifecycle Timeline
3DescriptionCVE.org
Inappropriate implementation in Guest View in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to perform UI spoofing via a crafted HTML page. (Chromium security severity: Medium)
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
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
Related Vulnerabilities in Google Chrome Use-After-Free and Memory Safety Flaws
View all 74Same weakness CWE-20 – Improper Input Validation
View allSame technique Information Disclosure
View allVendor StatusVendor
SUSE
Severity: Critical| Product | Status |
|---|---|
| openSUSE Leap 16.0 | Fixed |
| openSUSE Tumbleweed | Fixed |
EUVD-2026-35227
GHSA-7c3h-9xjm-v983
NVD
CVE.org
EPSS
Vulnrichment
VulDB
Exploit-DB