What is the CVSS score of EUVD-2026-34403?

EUVD-2026-34403 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Google Chrome are affected by EUVD-2026-34403?

Google Chrome versions below 149.0.7827.53 are vulnerable to remote code execution through a use-after-free flaw that allows attackers to execute arbitrary code when users visit malicious websites.. A patch is available.

How to fix or mitigate EUVD-2026-34403?

Within 24 hours: Verify Chrome version inventory across all endpoints using MDM or browser telemetry tools. Within 7 days: Deploy Chrome 149.0.7827.53 or later via automatic updates or managed deployment; prioritize endpoints accessed by employees visiting external websites. Within 30 days: Audit update compliance logs to confirm all Chrome installations are at the patched version and disable or isolate any non-compliant systems.

Google Chrome EUVD-2026-34403

| CVE-2026-10954 HIGH

Use After Free (CWE-416)

2026-06-04 chrome-cve-admin@google.com

GHSA-6jj2-wcwf-xw53

Google Memory Corruption RCE Use After Free Denial Of Service

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

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

SUSE

HIGH

qualitative

Red Hat

9.6 HIGH

qualitative

Primary rating from NVD.

CVSS VectorNVD

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

Lifecycle Timeline

Analysis Generated

Jun 05, 2026 - 02:50 vuln.today

CVSS changed

Jun 05, 2026 - 02:22 NVD

8.8 (HIGH)

CVE Published

Jun 04, 2026 - 23:16 nvd

HIGH 8.8

CVE Published

Jun 04, 2026 - 23:16 nvd

UNKNOWN (no severity yet)

DescriptionCVE.org

Use after free in Actor in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

AnalysisAI

Remote code execution in Google Chrome versions prior to 149.0.7827.53 stems from a use-after-free flaw in the Actor component that lets a remote attacker run arbitrary code within the renderer sandbox via a malicious HTML page. The flaw carries CVSS 8.8 and requires user interaction (visiting a crafted page), and at time of analysis there is no public exploit identified, though Chromium rates the security severity as High and a vendor patch has shipped.

Technical ContextAI

The vulnerability is a CWE-416 Use-After-Free in Chromium's Actor subsystem, a class of memory-safety bug where code continues to reference heap memory after it has been freed, enabling an attacker to control the contents at that address and ultimately hijack execution. Actor is part of Chromium's internal componentry reachable from web content via standard HTML/JS processing, so a crafted page loaded in the Blink renderer can trigger the dangling reference. Because the CVSS scope is Unchanged (S:U) and the description explicitly states execution occurs 'inside a sandbox,' initial code execution is constrained to the renderer process and would require a separate sandbox escape to reach the host OS - a typical Chromium exploitation pattern.

RemediationAI

Vendor-released patch: Google Chrome 149.0.7827.53 or later on the Stable channel - update via Chrome's built-in updater or by redeploying enterprise MSI/PKG packages, and consult the advisory at https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html and the Chromium issue tracker at https://issues.chromium.org/issues/506150628 for technical context. Organizations running Chromium derivatives (Edge, Brave, Opera, Electron-based apps) should track and apply the corresponding downstream releases as they pick up the upstream fix. As a compensating control until patching completes, enterprises can enforce Site Isolation (already default), block users from browsing arbitrary external HTML via web filtering/proxy policy, or disable Chrome's site-loading of the affected feature where a kill-switch enterprise policy exists; the trade-off is reduced functionality on legitimate sites and incomplete protection, since the trigger is generic HTML and not a niche feature.