Google Chrome up to 145.0.7632.159 WebMCP use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.4$5k-$25k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Google Chrome. Impacted is an unknown function of the component WebMCP. This manipulation causes use after free. This vulnerability is registered as CVE-2026-3918. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Google Chrome. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component WebMCP. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Use after free in WebMCP in Google Chrome prior to 146.0.7680.71 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)

It is possible to read the advisory at chromereleases.googleblog.com. This vulnerability is known as CVE-2026-3918 since 03/11/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 03/15/2026).

The vulnerability scanner Nessus provides a plugin with the ID 302011 (Debian dsa-6164 : chromium - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 146.0.7680.71 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (302011) and CERT Bund (WID-SEC-2026-0702). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Debian Linux
  • Fedora Linux
  • Google Chrome

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 8.8
ADP CISA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 302011
Nessus Name: Debian dsa-6164 : chromium - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Chrome 146.0.7680.71

Timelineinfo

03/11/2026 CVE reserved
03/12/2026 +1 days Advisory disclosed
03/12/2026 +0 days VulDB entry created
03/15/2026 +3 days VulDB entry last update

Sourcesinfo

Vendor: google.com
Product: google.com

Advisory: 483853
Status: Confirmed

CVE: CVE-2026-3918 (🔒)
GCVE (CVE): GCVE-0-2026-3918
GCVE (VulDB): GCVE-100-350575
CERT Bund: WID-SEC-2026-0702 - Google Chrome: Mehrere Schwachstellen

Entryinfo

Created: 03/12/2026 04:40
Updated: 03/15/2026 01:12
Changes: 03/12/2026 04:40 (58), 03/13/2026 14:23 (2), 03/13/2026 20:51 (7), 03/15/2026 01:12 (12)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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