CVE-2026-8587
📛 CVE Title
CVE-2026-8587
Description
Use after free in Extensions in Google Chrome on Mac prior to 148.0.7778.168 allowed an attacker who convinced a user to install a malicious extension to execute arbitrary code via a crafted Chrome Extension. (Chromium security severity: Medium)
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
- 2026-05-14
- 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-2026-8587.json
- Linked Threat
- CVE-2026-8587 — CVE-2026-8587
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.
- EPSS score
- 0.0002 (probability of exploitation in next 30 days)
- EPSS percentile
- 6.07% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD / KEV / EPSS data refreshed 2026-05-25 06:07 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-2026-30407 - Assigner
- Chrome
- Published
- May 14, 2026, 7:52:45 PM
- Updated
- May 15, 2026, 3:56:23 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
- Products
-
Chrome (148.0.7778.168 <148.0.7778.168)
- Aliases
-
GHSA-gqc5-p594-9chj
ENISA description: Use after free in Extensions in Google Chrome on Mac prior to 148.0.7778.168 allowed an attacker who convinced a user to install a malicious extension to execute arbitrary code via a crafted Chrome Extension. (Chromium security severity: Medium)
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 2026-07-28 03:00 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 |
|---|---|---|---|
| Chrome |
148.0.7778.168 (affected)
|
— |
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-2026-8587 rapid7:msrc.microsoft.com
- https://attackerkb.com/topics/CVE-2026-8587 rapid7:attackerkb.com
- http://cwe.mitre.org/data/definitions/416.html rapid7:cwe.mitre.org
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-30407 rapid7:euvd.enisa.europa.eu
- https://www.first.org/epss/ tenable:www.first.org
- https://nvd.nist.gov/vuln/detail/CVE-2026-8587 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-8587 tenable:www.cve.org
Remediations (15)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:app.opencve.io
A use‑after‑free flaw exists in the handling of Chrome extensions on macOS for versions prior to 148..7778.168. The defect allows an attacker who persuades a user to install a malicious extension to trigger a memory access after an object has been freed, resulting in arbitrary code execution. The weakness is classified as CWE‑416 and CWE‑825 and is rated medium severity by Chromium ...
2026-05-23 20:51 UTC -
web:cybersecuritynews.com
Microsoft Exchange Server spoofing flaw, is being actively exploited against on-premises systems before a permanent patch is available.
2026-05-23 20:51 UTC -
web:nvd.nist.gov
An official website of the United States government Here's how you know
2026-05-23 20:51 UTC -
web:security-tracker.debian.org
Vulnerable and fixed packages The table below lists information on source packages.
2026-05-23 20:51 UTC -
web:securityvulnerability.io
What is CVE-2026-8587 ? A use after free vulnerability in the Extensions component of Google Chrome on Mac allows attackers to exploit the flaw by convincing users to install malicious extensions.
2026-05-23 20:51 UTC -
web:techcommunity.microsoft.com
We wanted to tell you how to address the Exchange Server May 2026 vulnerability CVE - 2026 -42897.
2026-05-23 20:51 UTC -
web:www.aakashrahsi.online
CVE-2026-8587 is a Chromium Extensions use-after-free vulnerability. Learn impact, affected browsers, and key patching steps.
2026-05-23 20:51 UTC -
web:www.forbes.com
Microsoft Exchange users are urged to mitigate a zero-day vulnerability that CISA has confirmed is under active exploitation.
2026-05-23 20:51 UTC -
web:www.rapid7.com
Rapid7's VulnDB is curated repository of vetted computer software exploits and exploitable vulnerabilities.
2026-05-23 20:51 UTC -
web:www.thehackerwire.com
CVE-2026-8587 is a High severity vulnerability (CVSS 8.8). Use after free in Extensions in Google Chrome on Mac prior to 148..7778.168 allowed an attacker who convinced a user...
2026-05-23 20:51 UTC -
web:cybersecuritynews.com
Microsoft released its March 2026 Patch Tuesday security update on March 10, 2026 , addressing 78 vulnerabilities across Windows, Microsoft Office, Azure, SQL Server, and .NET. The update includes one actively exploited zero-day vulnerability and multiple Critical-rated flaws demanding immediate attention from security teams. The most urgent fix this month is CVE - 2026 -21262, the sole zero-day ...
2026-05-26 02:54 UTC -
web:support.microsoft.com
This out-of-band update for Windows 11, version 25H2 and 24H2 (KB5085518) includes fixes and improvements. To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained. For information on Windows update terminology, see the different types of Windows software updates ...
2026-05-26 02:54 UTC -
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 ...
2026-05-26 02:54 UTC -
web:www.pcworld.com
This month's Patch Tuesday includes an actively exploited Office zero-day vulnerability and several critical RCE bugs in Windows and Remote Desktop.
2026-05-26 02:54 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-05-26 02:54 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-8587.json.
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"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",
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{
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"role": "CISA Coordinator",
"timestamp": "2026-05-14T00:00:00+00:00",
"version": "2.0.3"
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"shortName": "CISA-ADP"
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"title": "CISA ADP Vulnrichment"
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"cna": {
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"product": "Chrome",
"vendor": "Google",
"versions": [
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"status": "affected",
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"references": [
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"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html"
},
{
"url": "https://issues.chromium.org/issues/507356235"
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"datePublished": "2026-05-14T19:52:45.474Z",
"dateReserved": "2026-05-14T05:40:28.363Z",
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