VulnerabilityPublished 11 Mar 2026Updated 14 Mar 2026

CVE-2026-3938: Google Chrome · Insufficient Policy Enforcement

Affects Google ChromeSource CVE Database V5

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Not known to be exploited · CVSS 6.5 Medium : upgrade to 146.0.7680.71 when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score

6.5Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 146.0.7680.71

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

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

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 11 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Google Chrome to 146.0.7680.71.

Affected software

Product	Affected	Fixed in
GoogleChrome	Affected >=146.0.7680.71 <146.0.7680.71	Fixed in 146.0.7680.71

AI-suggested

To mitigate CVE-2026-3938, organizations and users should immediately update Google Chrome to version 146.0.7680.71 or later, where the vulnerability is patched. Beyond patching, administrators can enforce stricter clipboard access policies via Chrome's enterprise policy settings to limit clipboard interactions to trusted sites only. Employing browser extensions or security solutions that monitor or restrict clipboard access can add an additional layer of defense. User education is critical to reduce the risk of social engineering attacks that rely on user interaction to trigger exploitation. Network-level protections such as web filtering and blocking access to known malicious sites can reduce exposure. For environments with high security requirements, consider disabling clipboard access in browser sandbox configurations or using isolated browsing profiles for untrusted content. Regularly auditing browser versions and enforcing update policies will help maintain security posture. Monitoring for unusual clipboard-related activity or anomalous renderer process behavior can aid in early detection of exploitation attempts.

Description

Insufficient policy enforcement in Clipboard in Google Chrome prior to 146.0.7680.71 allowed a remote attacker who had compromised the renderer process to leak cross-origin data via a crafted HTML page. (Chromium security severity: Low)

Impact

The primary impact of CVE-2026-3938 is unauthorized leakage of cross-origin clipboard data, which can lead to exposure of sensitive or confidential information. This can undermine data integrity by allowing attackers to access or exfiltrate data that should be isolated by the browser's same-origin policy. Organizations relying heavily on Chrome for web applications, especially those handling sensitive data via clipboard operations (e.g., web-based document editors, password managers, or financial services), are at risk of data leakage. Although the vulnerability does not directly compromise system availability or confidentiality in a traditional sense, the exposure of clipboard contents can facilitate further attacks such as phishing, social engineering, or credential theft. The requirement for user interaction (visiting a malicious page) means that social engineering or drive-by attacks are plausible exploitation vectors. Since the vulnerability requires the attacker to have compromised the renderer process, it may be chained with other exploits for full compromise. The absence of known exploits in the wild reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits post-disclosure. Failure to patch could lead to targeted attacks against high-value users or organizations, particularly those in sectors with high data sensitivity.

CWE-284Improper Access Control (opens in a new tab)
Pillar weaknessCWE Top 25 (2025): #19OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
MITRE discourages mapping vulnerabilities to this broad entry; the root cause is usually a more specific weakness.
Architecture and Design · Operation
Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
Architecture and Design · Separation of Privilege
Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
OWASP Cheat Sheets
Docker Security (opens in a new tab)
Third Party Javascript Management (opens in a new tab)
Virtual Patching (opens in a new tab)
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V1.4.4 (opens in a new tab)
V1.4.5 (opens in a new tab)
V1.10.1 (opens in a new tab)
Attack patterns
Embedding Scripts within Scripts (opens in a new tab)
Modification of Windows Service Configuration (opens in a new tab)
Malicious Root Certificate (opens in a new tab)
Intent Spoof (opens in a new tab)
WebView Exposure (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 20 Mar 2026, 02:23 UTC

WeaknessesCWE-284

Technical details

References

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