CVE-2026-9111

Description

Use after free in WebRTC in Google Chrome on Linux prior to 148.0.7778.179 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: Critical)

Overview

State: PUBLISHED
Assigner (CNA): Chrome
CVSS severity: high
CVSS score: 8.8 / 10
CVSS vector: AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Effective score: 8.8 / 10 HIGH source: CNA overview
CWE(s): CWE-416
Reserved: 2026-05-20
Published: 2026-05-20 19:12 UTC
Last updated: 2026-05-20 19:43 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/9xxx/CVE-2026-9111.json
Linked Threat: CVE-2026-9111 — CVE-2026-9111

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: 2026-05-20 20:16:41 UTC
NVD last modified: 2026-05-21 16:56:46 UTC
NVD CVSS v3.1: 8.8 / 10 HIGH source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploitability subscore: 2.8 / 10
Impact subscore: 5.9 / 10
EPSS score: 0.0003 (probability of exploitation in next 30 days)
EPSS percentile: 7.69% 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-2026-31160
Assigner: Chrome
Published: May 20, 2026, 7:12:39 PM
Updated: May 21, 2026, 3:55:44 AM
EUVD base score (CVSS 3.1): 8.8 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EUVD-reported EPSS: 0.0200
Vendors: Google
Products: Chrome (148.0.7778.179 <148.0.7778.179)
Aliases: GHSA-6r32-h5rg-9m59

ENISA description: Use after free in WebRTC in Google Chrome on Linux prior to 148.0.7778.179 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: Critical)

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 148.0.3967.83)
https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security — None Available / Release Notes

Microsoft FAQ (2)

What is the version information for this release?

Microsoft Edge Version	Date Released	Based on Chromium Version
148.0.3967.83	05/21/2026	148.0.7778.180

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

Affected products (1)

Vendor	Product	Versions	Platforms
Google	Chrome	`148.0.7778.179` (affected)	—

Affected products — CPE 2.3 (4) 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:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*

Vendor references (2)

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

Web references (7)

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

MSRC update guide: CVE-2026-9111 msrc
None Available msrc
https://issues.chromium.org/issues/504551032 tenable:issues.chromium.org
https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0841193308.html tenable:chromereleases.googleblog.com
https://nvd.nist.gov/vuln/detail/CVE-2026-9111 tenable:nvd.nist.gov
https://www.cve.org/CVERecord?id=CVE-2026-9111 tenable:www.cve.org
https://www.first.org/epss/ tenable:www.first.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_0841193308.html chrome-cve-admin@google.com Vendor Advisory
https://issues.chromium.org/issues/504551032 chrome-cve-admin@google.com Permissions Required

Remediations (17)

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

CVE-2026-9111 - Vulnerability Details - OpenCVE

web:app.opencve.io

Update Google Chrome to the latest stable release (≥148..7778.179) to receive the fix reported in the official release notes If an update is not immediately possible, disable WebRTC in Chrome's settings or use a security extension that blocks WebRTC usage to reduce the attack surface Apply network‑level blocking or filtering to prevent access to known malicious domains or to limit the ...

2026-05-23 22:18 UTC
Patch Tuesday, May 2026 Edition - Krebs on Security

web:krebsonsecurity.com

Microsoft expects that exploitation is more likely. May's Patch Tuesday is a welcome respite from April, which saw Microsoft fix a near-record 167 security flaws.

2026-05-23 22:18 UTC
Nvd - Cve-2026-9111

web:nvd.nist.gov

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

2026-05-23 22:18 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 22:18 UTC
CVE-2026-9111 | Ubuntu

web:ubuntu.com

Description Use after free in WebRTC in Google Chrome on Linux prior to 148..7778.179 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: Critical) Read the notes from the security team

2026-05-23 22:18 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 22:18 UTC
March 2026 Patch Tuesday: Updates and Analysis | CrowdStrike

web:www.crowdstrike.com

Microsoft's March 2026 Patch Tuesday addresses 82 CVEs , featuring eight Critical vulnerabilities.

2026-05-23 22:18 UTC
April 2026 Patch Tuesday | Ivanti

web:www.ivanti.com

April Patch Tuesday is the second-largest Patch Tuesday on record behind the October 2025 Patch Tuesday which resolved 175 CVEs . The lineup includes one zero-day exploit ( CVE - 2026 -3220) and one public disclosure ( CVE - 2026 -33825) and breaks down into 8 Critical, 156 Important, 3 Moderate and 1 Low severity.

2026-05-23 22:18 UTC
Oracle Critical Patch Update Advisory - April 2026

web:www.oracle.com

This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

2026-05-23 22:18 UTC
Patch Tuesday May 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

2026-05-23 22:18 UTC
Microsoft November 2025 Patch Tuesday - 63 Vulnerabilities, Including 1 ...

web:cybersecuritynews.com

Microsoft rolled out its November 2025 Patch Tuesday security updates today, addressing 63 vulnerabilities across its product and service ecosystem.

2026-05-26 02:59 UTC
Windows 11, version 23H2 known issues and notifications

web:learn.microsoft.com

As of November 11, 2025, Home and Pro editions of Windows 11, version 23H2 have reached end of servicing. Enterprise and Education editions of version 23H2 will continue to receive monthly security updates until November 10, 2026 .

2026-05-26 02:59 UTC
Microsoft: Out-of-band update fixes Windows 11 hotpatch install loop

web:www.bleepingcomputer.com

Microsoft has released an out-of-band cumulative update to fix a known issue causing the November 2025 KB5068966 hotpatch update to reinstall on Windows 11 systems repeatedly.

2026-05-26 02:59 UTC
Windows 11 February 2026 Patch: KB5077181 and KB5075941 fix zero-days ...

web:www.notebookcheck.net

Microsoft's February 2026 Windows 11 updates (KB5077181 and KB5075941) add security patches, bug fixes, and new Secure Boot rollout signals ahead of certificate expirations starting in June 2026 .

2026-05-26 02:59 UTC
Microsoft rolls out emergency fix for Windows Update issue

web:www.pcworld.com

Microsoft has begun rolling out update KB5072753, a new emergency out-of-band patch for Windows 11 that fixes a bug that was introduced in November's KB5068966 update.

2026-05-26 02:59 UTC
Windows 11 April 2026 Update tested: What's new, improved and fixed

web:www.windowslatest.com

Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.

2026-05-26 02:59 UTC
Microsoft releases a second Windows 11 emergency patch as the Patch ...

web:www.xda-developers.com

Windows 11's second emergency patch of the month fixes a nasty Outlook issue You no longer need to deploy your own fixes A few days ago, we caught wind that Outlook was really struggling on ...

2026-05-26 02:59 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-9111.json.

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              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "baseScore": 8.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
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                "options": [
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                  },
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                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-20T19:43:36.447414Z",
                "version": "2.0.3"
              },
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            }
          }
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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        {
          "product": "Chrome",
          "vendor": "Google",
          "versions": [
            {
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        },
        {
          "url": "https://issues.chromium.org/issues/504551032"
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    "dateReserved": "2026-05-20T17:39:14.333Z",
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