CVE-2026-9887
📛 CVE Title
Debian: CVE-2026-9887: chromium -- security update
Description
Use after free in Proxy in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to execute arbitrary code via a crafted PAC script. (Chromium security severity: Critical)
Overview
- State
- —
- Assigner (CNA)
- —
- CVSS severity
- MEDIUM
- CVSS score
- 5.0 / 10
- CVSS vector
AV:N/AC:M/Au:N/C:C/I:C/A:C- Effective score
- 5.0 / 10 MEDIUM source: CNA overview
- CWE(s)
- —
- Reserved
- —
- Published
- 2026-06-01 00:00 UTC
- Last updated
- 2026-06-19 14:40 UTC
- Source
- https://www.rapid7.com/db/vulnerabilities/debian-cve-2026-9887/
- Linked Threat
- CVE-2026-9887 — CVE-2026-9887
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
- 2026-05-28 23:16:46 UTC
- NVD last modified
- 2026-07-21 11:10:00 UTC
- NVD CVSS v3.1
- 8.8 / 10 HIGH source: nvd@nist.gov
- 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
- 0.0022 (probability of exploitation in next 30 days)
- EPSS percentile
- 12.36% vs all CVEs — higher = more likely to be exploited, as of 2026-07-26
NVD-assigned CWE(s):
CWE-416
(differs from the CNA list above)
NVD / KEV / EPSS data refreshed 2026-07-27 14:04 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-2026-33182 - Assigner
- Chrome
- Published
- May 28, 2026, 10:25:12 PM
- Updated
- May 30, 2026, 3:57:23 AM
- EUVD base score (CVSS 3.1)
-
7.8 / 10
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EUVD-reported EPSS
- 0.2200
- Vendors
- Products
-
Chrome (148.0.7778.216 <148.0.7778.216)
- Aliases
-
GHSA-3pm9-x6w9-wfc3
ENISA description: Use after free in Proxy in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to execute arbitrary code via a crafted PAC script. (Chromium security severity: Critical)
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 2026-08-15 03:02 UTC (source: CVRF).
- Release
- 2026-May
Microsoft remediations / KB articles (2)
- Release Notes — Vendor Fix / Security Update (fixed build 148.0.3967.96)
- 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 |
|---|---|---|
| 148.0.3967.96 | 05/29/2026 | 148.0.7778.216/217 |
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 — 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:microsoft:windows:-:*:*:*:*:*:*:*cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
Vendor references (0)
References embedded in the original CVE record by the assigning CNA.
None in the CVE record.
Web references (11)
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-2026-9887 msrc
- http://chromereleases.googleblog.com/2026/06/long-term-support-channel-update-for.html tenable:chromereleases.googleblog.com
- https://issues.chromium.org/issues/511249104 tenable:issues.chromium.org
- https://nvd.nist.gov/vuln/detail/CVE-2026-9887 tenable:nvd.nist.gov
- https://www.first.org/epss/ tenable:www.first.org
- https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html rapid7:chromereleases.googleblog.com
- https://www.cve.org/CVERecord?id=CVE-2026-9887 rapid7:www.cve.org
- http://cwe.mitre.org/data/definitions/416.html rapid7:cwe.mitre.org
- https://attackerkb.com/topics/CVE-2026-9887 rapid7:attackerkb.com
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-33182 rapid7:euvd.enisa.europa.eu
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_0877304591.html chrome-cve-admin@google.com Vendor Advisory
- https://issues.chromium.org/issues/511249104 chrome-cve-admin@google.com Permissions Required
Remediations (12)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
rapid7
google-chrome-upgrade-latest
2026-06-04 08:58 UTC -
rapid7
debian-upgrade-chromium
2026-06-04 08:55 UTC -
web:cybernews.com
Hackers can break in without any credentials. Ubiquiti released emergency updates, including a UniFi Express firmware patch , that fix two vulnerabilities in the UniFi Network Application, the ecosystem's software for managing UniFi devices, setting up WiFi networks, configuring firewalls, monitoring traffic, and more.
2026-06-19 02:29 UTC -
web:cybersecuritynews.com
Microsoft's May 2026 Patch Tuesday lands with a heavy enterprise focus, fixing 120 vulnerabilities across Windows, Office, Azure, developer tools, and Microsoft 365 apps, including 29 remote code execution (RCE) flaws rated Critical.
2026-06-19 02:29 UTC -
web:nvd.nist.gov
An official website of the United States government Here's how you know
2026-06-19 02:29 UTC -
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.
2026-06-19 02:29 UTC -
web:support.microsoft.com
This update for Windows 11, version 25H2 and 24H2 (KB5084597) incudes security 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. To view the ...
2026-06-19 02:29 UTC -
web:vulners.com
CVE-2026-9887 is a use-after-free vulnerability in the Chromium-based Proxy component of Google Chrome, exploitable via a crafted PAC script to achieve remote code execution. The flaw affects Chrome before version 148..7778.216, and Google releas...
2026-06-19 02:29 UTC -
web:www.computerworld.com
Microsoft says it is considering a patch for a zero-day vulnerability, dubbed YellowKey, that allows attackers with access to a Windows device to bypass Bitlocker encryption protection and read ...
2026-06-19 02:29 UTC -
web:www.rapid7.com
Microsoft is publishing 200 vulnerabilities on June 2026 Patch Tuesday, including an HTTP/2 denial of service vulnerability and an elevation of privilege vulnerability in PowerToys.
2026-06-19 02:29 UTC -
web:www.veeam.com
When a vulnerability is identified, our team promptly develops a patch to address and mitigate the risk. In line with our dedication to transparency, we publicly disclose the vulnerability and provide detailed mitigation information.
2026-06-19 02:29 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's June 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-06-19 02:29 UTC
AI Forensic Analysis
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