CVE-2026-8580

Description

Use after free in Mojo in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)

Overview

State: PUBLISHED
Assigner (CNA): Chrome
CVSS severity: critical
CVSS score: 9.6 / 10
CVSS vector: AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Effective score: 9.6 / 10 CRITICAL source: CNA overview
CWE(s): CWE-416
Reserved: 2026-05-14
Published: 2026-05-14 21:52 UTC
Last updated: 2026-05-15 05:56 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/8xxx/CVE-2026-8580.json
Linked Threat: CVE-2026-8580 — CVE-2026-8580

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-05-14 20:17:20 UTC
NVD last modified: 2026-05-19 15:18:41 UTC
NVD CVSS v3.1: 9.6 / 10 CRITICAL source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Exploitability subscore: 2.8 / 10
Impact subscore: 6.0 / 10
EPSS score: 0.0007 (probability of exploitation in next 30 days)
EPSS percentile: 22.09% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-30402
Assigner: Chrome
Published: May 14, 2026, 7:52:41 PM
Updated: May 15, 2026, 3:56:50 AM
EUVD base score (CVSS 3.1): 9.6 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EUVD-reported EPSS: 0.0700
Vendors: Google
Products: Chrome (148.0.7778.168 <148.0.7778.168)
Aliases: GHSA-x92g-vvxp-v39w

ENISA description: Use after free in Mojo in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)

EUVD references (2)

Microsoft Security Response Center MSRC

Microsoft's vendor-authoritative record from the Security Update Guide — its own CVSS score, impact, severity rating, exploit assessment, and KB-article fixes. Refreshed 2026-08-12 01:09 UTC (source: CVRF).

Release: 2026-May

Microsoft remediations / KB articles (2)

Release Notes — Vendor Fix / Security Update (fixed build 148.0.3967.70)
https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security — None Available / Release Notes

Microsoft FAQ (2)

Why is this Chrome CVE included in the Security Update Guide?

The vulnerability assigned to this CVE is in Chromium Open Source Software (OSS) which is consumed by Microsoft Edge (Chromium-based). It is being documented in the Security Update Guide to announce that the latest version of Microsoft Edge (Chromium-based) is no longer vulnerable.

How can I see the version of the browser?

In your Microsoft Edge browser, click on the 3 dots (...) on the very right-hand side of the window
Click on Help and Feedback
Click on About Microsoft Edge

What is the version information for this release?

Microsoft Edge Version	Date Released	Based on Chromium Version
148.0.3967.70	05/15/2026	148.0.7778.168

Affected products (1)

Vendor	Product	Versions	Platforms
Google	Chrome	`148.0.7778.168` (affected)	—

Affected products — CPE 2.3 (1) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

Vendor references (2)

References embedded in the original CVE record by the assigning CNA.

MITRE references (2) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

Web references (8)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

None Available msrc
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-8580 rapid7:msrc.microsoft.com
https://attackerkb.com/topics/CVE-2026-8580 rapid7:attackerkb.com
http://cwe.mitre.org/data/definitions/416.html rapid7:cwe.mitre.org
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-30402 rapid7:euvd.enisa.europa.eu
https://www.first.org/epss/ tenable:www.first.org
https://nvd.nist.gov/vuln/detail/CVE-2026-8580 tenable:nvd.nist.gov
https://www.cve.org/CVERecord?id=CVE-2026-8580 tenable:www.cve.org

NVD-tagged references (2)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html chrome-cve-admin@google.com Vendor Advisory
https://issues.chromium.org/issues/496639647 chrome-cve-admin@google.com Permissions Required

Remediations (16)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

CVE-2026-8580 - Vulnerability Details - OpenCVE

web:app.opencve.io

Remediation No vendor fix or workaround currently provided. OpenCVE Recommended Actions Update Google Chrome to the latest stable release. Enable automatic updates on all devices to ensure the patch is applied without manual action.

2026-05-23 20:51 UTC
CISA Warns of Exploited Microsoft Defender 0-Day Flaws

web:cyberpress.org

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two actively exploited Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, issuing an urgent remediation directive for federal agencies with a due date of June 3, 2026 .

2026-05-23 20:51 UTC
CVE-2026-8580 | Security Details | Sonatype Guide

web:guide.sonatype.com

Technical security analysis for CVE-2026-8580 . CVSS 9.6 severity. View CVSS vectors, CWE classifications, and exploit maturity ratings.

2026-05-23 20:51 UTC
Nvd - Cve-2026-8580

web:nvd.nist.gov

An official website of the United States government Here's how you know

2026-05-23 20:51 UTC
Security Update Guide - Microsoft

web:portal.msrc.microsoft.com

The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

2026-05-23 20:51 UTC
CVE-2026-8580 - security-tracker.debian.org

web:security-tracker.debian.org

Vulnerable and fixed packages The table below lists information on source packages.

2026-05-23 20:51 UTC
Microsoft March 2026 Patch Tuesday fixes 2 zero-days, 79 flaws

web:www.bleepingcomputer.com

Today is Microsoft's March 2026 Patch Tuesday with security updates for 79 flaws, including 2 publicly disclosed zero-day vulnerabilities.

2026-05-23 20:51 UTC
February's Patch Tuesday release fixes 59 flaws ... - Computerworld

web:www.computerworld.com

Each month, the team at Readiness analyzes the latest Patch Tuesday updates from Microsoft and provides detailed, actionable testing guidance. The company's Patch Tuesday release for February ...

2026-05-23 20:51 UTC
Emergency patch issued for Microsoft Office, 365 over hacking threat - MSN

web:www.msn.com

Original story: Microsoft has released an emergency patch for a vulnerability in the company's Office programs that's already being exploited by hackers.

2026-05-23 20:51 UTC
Rapid7 Vulnerability Database

web:www.rapid7.com

vulnerability Google Chrome Vulnerability: CVE-2026-8580 Use after free in Mojo

2026-05-23 20:51 UTC
CVE-2026-8580 - Google Chrome Mojo Use-After-Free Vulnerability

web:cvefeed.io

Use after free in Mojo in Google Chrome prior to 148..7778.168 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)

2026-05-26 02:54 UTC
Ubiquiti rushes out emergency fix for critical bug in UniFi Network ...

web:cybernews.com

Ubiquiti has released emergency updates for its UniFi Network Application - a critical vulnerability allows hackers to compromise systems without credentials.

2026-05-26 02:54 UTC
CVE-2026-8580 - Exploits & Severity - Feedly

web:feedly.com

Mitigation Update Google Chrome to version 148..7778.168 or later immediately. Additionally, apply browser security policies that restrict users from accessing untrusted websites and consider deploying browser isolation technologies for high-risk users.

2026-05-26 02:54 UTC
Addressing Exchange Server May 2026 vulnerability CVE-2026-42897

web:techcommunity.microsoft.com

More information on this service can be found in Exchange Emergency Mitigation Service (Exchange EM Service) | Microsoft Learn. Customers with EM Service enabled can verify that their servers have applied the mitigation for CVE - 2026 -42897 (the ID of mitigation is M2.1.x) by doing the following:

2026-05-26 02:54 UTC
CVE: Common Vulnerabilities and Exposures

web:www.cve.org

At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures

2026-05-26 02:54 UTC
Google Chrome Mojo Use-After-Free Sandbox Escape (CVE-2026-8580)

web:www.thehackerwire.com

Summary CVE-2026-8580 describes a critical use-after-free vulnerability in the Mojo component of Google Chrome. Published on May 14, 2026 , this flaw carries a CVSS score...

2026-05-26 02:54 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-8580.json.

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              "baseScore": 9.6,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "CHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
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        },
        "title": "CISA ADP Vulnrichment"
      }
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    "cna": {
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          "versions": [
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    "dateReserved": "2026-05-14T05:40:26.773Z",
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