Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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ReconAttacker crafts malicious HTML page
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DeliveryDelivers page to victim via phishing/compromised site
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ExploitUser opens page in Chrome
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InstallUser interacts with page element
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C2HTML triggers Downloads policy bypass
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ExecuteAttacker accesses restricted download directory or navigates to protected location
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ImpactInformation disclosure or unauthorized file access achieved
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V15 - Secure Coding and Architecture Protection mechanism completeness
|
| Exploitation Conditions | Exploitation requires the victim to be a local user with Chrome installed and active, AND the victim must open a crafted HTML page (via browser navigation, email link, or local file access) AND interact with that page in a way that triggers the Downloads handler (e.g., clicking a link, triggering a download action, or submitting a form). The vulnerability does NOT require authentication to Chrome, elevated system privileges, or any special Chrome configuration - it is a policy enforcement flaw in the default Downloads feature. The attack is strictly LIMITED to local attackers or remote attackers who can deliver the HTML to the target (e.g., via phishing), and it is LIMITED by the UI:R requirement (user interaction is mandatory). Remote network-based exploitation without user engagement is NOT possible. Systems running Chrome 148.0.7778.96 or later are NOT vulnerable. |
| Impact | This is a low-to-moderate priority issue with conflicting risk signals. The CVSS score of 4.4 reflects moderate severity: local attack vector (AV:L) and low complexity (AC:L) indicate relatively straightforward exploitation, but the requirement for user interaction (UI:R) and lack of confidentiality/integrity impact on the system itself (C:L/I:L/A:N) substantially limit real-world impact. The vulnerability does not result in remote code execution, privilege escalation, or denial of service. The Chromium project assessed this as 'Medium' severity, which aligns with CVSS 4.4 - below critical thresholds. No EPSS score, KEV status, or active exploitation evidence was provided in the input data, suggesting this is a responsibly disclosed issue rather than actively exploited malware vector. The primary risk is targeted attacks against users who open a malicious HTML page, potentially exposing sensitive download histories or allowing local file write access in restricted directories. This is a realistic but narrow threat model compared to network-based exploitation. Defender priority should reflect the requirement for user interaction and local presence; mass exploitation is unlikely. |
| Exploit ScenarioDerived | An attacker crafts a malicious HTML page that, when opened by a user in Chrome, exploits the insufficient policy enforcement in the Downloads handler to bypass navigation restrictions. The user might visit this page via a phishing email or compromised website. Upon interaction with the page (e.g., clicking a link or triggering a download action), the attacker's HTML crafts a request that navigates to a restricted download directory or system location that should normally be blocked. This could allow the attacker to read the user's download history, access previously downloaded sensitive files, or write files to restricted directories if the Downloads policy also governs file write permissions. The attack requires the user to open the malicious page and interact with it - it does not occur passively. |
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Alert meAnalysisAIv1 – May 06, 2026
Insufficient policy enforcement in Chrome's Downloads feature prior to version 148.0.7778.96 allows local attackers with user interaction to bypass navigation restrictions and access sensitive download locations via a crafted HTML page, potentially leading to information disclosure or file manipulation. The vulnerability requires local access and user engagement with a malicious page, limiting its scope to targeted social engineering rather than remote mass exploitation.
RemediationAI
Vendor-released patch: Google Chrome 148.0.7778.96 or later. Users should update to this version immediately through Chrome's automatic update mechanism or manually via Settings > About Google Chrome, which will trigger an automatic check and install. No workarounds for this vulnerability have been disclosed; the fix requires applying the patched version. The update resolves the insufficient policy enforcement in the Downloads feature, restoring navigation restriction protections. Users should verify their installed version is at least 148.0.7778.96; Chrome auto-updates to the latest stable release, but users on managed/enterprise deployments should confirm their update policies allow deployment of this patch.
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
This vulnerability affects Chrome's download policy enforcement mechanism, a security control designed to restrict where users can save downloaded files and what navigation paths are accessible during the download process. The issue resides in the Downloads subsystem of Chromium (cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*), specifically in how the browser validates HTML page inputs against download destination policies. CWE classification was not provided, but the core weakness involves insufficient input validation or policy boundary enforcement when processing crafted HTML that interacts with the download handler, allowing an attacker to circumvent intended restrictions on file system navigation.
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Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
Insufficient policy enforcement in Downloads in Google Chrome prior to 148.0.7778.96 allowed a local attacker to bypass navigation restrictions 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
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EUVD-2026-27967
NVD
CVE.org
EPSS
Vulnrichment
VulDB
GitHub PoC
Exploit-DB