CVE-2026-11656
📛 CVE Title
Chromium: CVE-2026-11655 Integer overflow in Media
Description
Use after free in ServiceWorker in Google Chrome prior to 149.0.7827.103 allowed an attacker who convinced a user to install a malicious extension to potentially perform a sandbox escape via a crafted Chrome Extension. (Chromium security severity: High)
Overview
- State
- —
- Assigner (CNA)
- —
- CVSS severity
- high
- CVSS score
- 8.3 / 10
- CVSS vector
AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H- Effective score
- 8.3 / 10 HIGH source: CNA overview
- CWE(s)
- —
- Reserved
- —
- Published
- 2026-06-09 07:00 UTC
- Last updated
- 2026-06-20 01:43 UTC
- Source
- https://www.tenable.com/cve/CVE-2026-11656
- Linked Threat
- CVE-2026-11656 — CVE-2026-11656
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
- 2026-06-09 00:16:48 UTC
- NVD last modified
- 2026-07-23 08:10:00 UTC
- NVD CVSS v3.1
- 8.3 / 10 HIGH source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
- NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H- Exploitability subscore
- 1.6 / 10
- Impact subscore
- 6.0 / 10
- EPSS score
- 0.0017 (probability of exploitation in next 30 days)
- EPSS percentile
- 6.59% vs all CVEs — higher = more likely to be exploited, as of 2026-08-01
NVD-assigned CWE(s):
CWE-416
(differs from the CNA list above)
NVD / KEV / EPSS data refreshed 2026-08-01 16:33 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
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-2026-35256 - Assigner
- Chrome
- Published
- Jun 8, 2026, 11:27:37 PM
- Updated
- Jun 9, 2026, 3:56:11 AM
- EUVD base score (CVSS 3.1)
-
8.3 / 10
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H - EUVD-reported EPSS
- 0.1700
- Vendors
- Products
-
Chrome (149.0.7827.103 <149.0.7827.103)
- Aliases
-
GHSA-g324-4x5c-75c4
ENISA description: Use after free in ServiceWorker in Google Chrome prior to 149.0.7827.103 allowed an attacker who convinced a user to install a malicious extension to potentially perform a sandbox escape via a crafted Chrome Extension. (Chromium security severity: High)
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 2026-07-23 03:00 UTC (source: CVRF).
- Release
- 2026-Jun
Microsoft remediations / KB articles (2)
- Release Notes — Vendor Fix / Security Update (fixed build 149.0.4022.62)
- 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 |
|---|---|---|
| 149.0.4022.62 | 06/15/2026 | 149.0.7827.103 |
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 (0)
References embedded in the original CVE record by the assigning CNA.
None in the CVE record.
Web references (6)
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
- MSRC update guide: CVE-2026-11656 msrc
- https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0153744567.html tenable:chromereleases.googleblog.com
- https://issues.chromium.org/issues/513424000 tenable:issues.chromium.org
- https://nvd.nist.gov/vuln/detail/CVE-2026-11656 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-11656 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/2026/06/stable-channel-update-for-desktop_0153744567.html chrome-cve-admin@google.com Release NotesVendor Advisory
- https://issues.chromium.org/issues/513424000 chrome-cve-admin@google.com Permissions Required
Remediations (10)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:cybersecuritynews.com
Microsoft has officially acknowledged a critical zero-day vulnerability in Microsoft Defender, publicly dubbed "RoguePlanet," and confirmed it is actively developing a security patch to address the flaw.
2026-06-19 02:38 UTC -
web:cybersixt.com
Microsoft disclosed a zero‑day vulnerability in its Defender antivirus engine, tracked as CVE - 2026 -50656, which allows local attackers to gain SYSTEM privileges via a race condition. A public proof‑of‑concept exploit has been released, prompting the company to work on an urgent patch . Users are advised to apply the update once available and monitor Defender for anomalous activity.
2026-06-19 02:38 UTC -
web:denizhalil.com
A defining aspect of CVE - 2026 -50656 is its highly resilient execution context. The exploit functions seamlessly regardless of whether Real-Time Protection is enabled or disabled, and it remains operational even when Microsoft Defender is configured in passive mode alongside a third-party endpoint protection product. The flaw primarily leverages the engine's routine handling of file upload ...
2026-06-19 02:38 UTC -
web:nvd.nist.gov
An official website of the United States government Here's how you know
2026-06-19 02:38 UTC -
web:securityaffairs.com
Microsoft confirmed the RoguePlanet Defender zero-day ( CVE - 2026 -50656), a privilege escalation flaw, and is developing a security patch .
2026-06-19 02:38 UTC -
web:thecyberexpress.com
A newly disclosed Windows Defender vulnerability, tracked as CVE - 2026 -50656 and dubbed RoguePlanet, has raised concerns across the cybersecurity community after a working proof-of-concept (PoC) exploit was released before a security patch became available. The exploit was published on GitHub by security researcher Nightmare Eclipse on June 10, 2026 , only hours after Microsoft issued its June ...
2026-06-19 02:38 UTC -
web:threatprotect.qualys.com
Mitigation Microsoft has not released a patch to address the vulnerability at the time of writing. The advisory states that Microsoft is working on a high-quality security update that addresses this vulnerability. They will provide information in this CVE when the update is available.
2026-06-19 02:38 UTC -
web:www.anavem.com
No patch is available as of June 18, 2026 . Microsoft has confirmed it is actively developing a fix for CVE - 2026 -50656, but no KB article or MSRC advisory has been published yet. Administrators should apply application allowlisting as an interim mitigation while awaiting the official update.
2026-06-19 02:38 UTC -
web:www.linkedin.com
Microsoft has confirmed that it is developing a security update to address a newly disclosed zero-day vulnerability in Microsoft Defender, following the public release of exploit code that ...
2026-06-19 02:38 UTC -
web:www.malwarebytes.com
Microsoft says it's working on a fix for an unpatched Defender vulnerability that can give attackers the highest level of access on Windows.
2026-06-19 02:38 UTC
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