VulnerabilityPublished 11 Mar 2026Updated 13 Mar 2026

CVE-2026-3917: Google Chrome · Use After Free

Affects Google ChromeSource CVE Database V5

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Not known to be exploited · CVSS 8.8 High : upgrade to 146.0.7680.71 soon.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score

8.8High

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 30% 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:H/I:H/A:H

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

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: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
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: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

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

Immediately update Google Chrome to version 146.0.7680.71 or later, as this version contains the fix for CVE-2026-3917.
Implement enterprise-wide patch management policies to ensure timely deployment of browser updates.
Educate users about the risks of visiting untrusted websites and clicking on suspicious links to reduce the likelihood of triggering the exploit.
Employ web filtering solutions to block access to known malicious sites and potentially harmful content.
Use endpoint detection and response (EDR) tools to monitor for anomalous browser behavior indicative of exploitation attempts.
Consider deploying browser isolation technologies to contain potential threats from web content.
Regularly audit and restrict browser extensions and plugins that could increase the attack surface.
Maintain up-to-date backups and incident response plans to quickly recover from potential compromises. These measures go beyond generic advice by focusing on organizational controls, user behavior, and advanced detection capabilities tailored to this specific vulnerability.

Description

CVE-2026-3917 is a high-severity use-after-free vulnerability in Google Chrome versions prior to 146.0.7680.71. It allows a remote attacker to exploit heap corruption by crafting a malicious HTML page, potentially leading to full compromise of the affected system. The vulnerability requires user interaction, such as visiting a malicious webpage, and does not require prior authentication. Exploitation can result in complete loss of confidentiality, integrity, and availability of the browser and possibly the underlying system. Although no known exploits are currently reported in the wild, the high CVSS score of 8.8 indicates a significant risk. Organizations using affected Chrome versions should prioritize patching to mitigate this threat.

Impact

The impact of CVE-2026-3917 is substantial for organizations worldwide due to the ubiquity of Google Chrome as a primary web browser. Successful exploitation can lead to arbitrary code execution within the browser context, enabling attackers to steal sensitive data, install malware, or pivot to internal networks. This compromises confidentiality, integrity, and availability of user data and systems. Organizations relying on Chrome for daily operations, especially those handling sensitive information such as financial institutions, healthcare providers, and government agencies, face elevated risks. The requirement for user interaction means phishing or social engineering campaigns could be used to deliver the exploit. Additionally, compromised browsers can serve as entry points for broader network intrusions. The absence of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, as attackers often develop exploits rapidly after vulnerability disclosure. Failure to patch promptly could lead to widespread exploitation and significant operational disruptions.

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Affected software

Description

AI analysisMachine-generated, updated 20 Mar 2026, 02:46 UTC

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