CVE-2026-9958

Description

Use after free in PDFium in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to potentially exploit heap corruption via a crafted PDF file. (Chromium security severity: High)

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-2026-9958/

Linked Threat

CVE-2026-9958 — CVE-2026-9958

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 23:16:54 UTC

NVD last modified

2026-06-17 11:05:53 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

0.0022 (probability of exploitation in next 30 days)

EPSS percentile

12.94% vs all CVEs — higher = more likely to be exploited, as of 2026-06-29

NVD-assigned CWE(s): CWE-416 (differs from the CNA list above)

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-2026-33100

Assigner

Chrome

Published

May 28, 2026, 10:25:37 PM

Updated

May 30, 2026, 3:57:31 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

0.2200

Vendors

Google

Products

Chrome (148.0.7778.216 <148.0.7778.216)

Aliases

GHSA-2wcg-7wr3-q72q

ENISA description: Use after free in PDFium in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to potentially exploit heap corruption via a crafted PDF file. (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 2026-08-15 03:02 UTC (source: CVRF).

Release

2026-May

Vendor references (0)

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

None in the CVE record.

Web references (10)

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-2026-9958 msrc
• None Available msrc
• https://www.first.org/epss/ tenable:www.first.org
• https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html tenable:chromereleases.googleblog.com
• https://nvd.nist.gov/vuln/detail/CVE-2026-9958 tenable:nvd.nist.gov
• https://issues.chromium.org/issues/504555886 rapid7:issues.chromium.org
• http://cwe.mitre.org/data/definitions/416.html rapid7:cwe.mitre.org
• https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-33100 rapid7:euvd.enisa.europa.eu
• https://www.cve.org/CVERecord?id=CVE-2026-9958 rapid7:www.cve.org
• https://attackerkb.com/topics/CVE-2026-9958 rapid7:attackerkb.com

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

• Rapid7 — Solution
  rapid7

  google-chrome-upgrade-latest

  2026-06-04 08:59 UTC
• Rapid7 — Solution
  rapid7

  debian-upgrade-chromium

  2026-06-04 08:56 UTC
• Security Advisories and Bulletins | Microsoft Learn
  web:learn.microsoft.com

  In this library you will find the following security documents that have been released by the Microsoft Security Response Center (MSRC). The MSRC investigates all reports of security vulnerabilities affecting Microsoft products and services, and releases these documents as part of the ongoing effort to help you manage security risks and help keep your systems protected. Please use the ...

  2026-06-19 02:30 UTC
• Security Update Guide - Loading - 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.

  2026-06-19 02:30 UTC
• SAP Security Patch Day - February 2026
  web:support.sap.com

  SAP security Patch Day Bulletin This post shares the information on security notes that remediate vulnerabilities discovered in SAP products. SAP strongly recommends that the customer visits the Support Portal and applies patches on priority to protect their SAP landscape. On 10th of February 2026 , SAP security patch day saw the release of 26 new security notes. Further, there was 1 update to ...

  2026-06-19 02:30 UTC
• Patch Tuesday Vulnerability Insights - Action1
  web:www.action1.com

  Patch Tuesday is a scheduled release day for software patches, primarily used by Microsoft, to fix security vulnerabilities, bugs, and performance issues in its software products like Windows, Office, and Azure. It occurs monthly and aims to standardize the process of delivering security updates to ensure devices remain protected.

  2026-06-19 02:30 UTC
• Fortinet Releases Guidance to Address Ongoing Exploitation of ... - CISA
  web:www.cisa.gov

  Fortinet Releases Guidance to Address Ongoing Exploitation of Authentication Bypass Vulnerability CVE - 2026 -24858

  2026-06-19 02:30 UTC
• Patch Tuesday: May 2026 Latest Patch Updates & Breakdown
  web:www.manageengine.com

  Unfold what this Patch Tuesday has in store for you Patch Tuesday, the unofficial term for Microsoft's scheduled security fix release on every second Tuesday of a month, has been a constant topic of discussion ever since its inception. Upcoming Webinar June 11,2026 11:30 EDT & 6:30 a.m. GMT Agenda of the Free Patch Tuesday webinar A complete breakdown of all the latest Patch Tuesday updates ...

  2026-06-19 02:30 UTC
• Patch Tuesday - June 2026 - Rapid7
  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 02:30 UTC
• Rapid7 Vulnerability Database
  web:www.rapid7.com

  Rapid7's VulnDB is curated repository of vetted computer software exploits and exploitable vulnerabilities.

  2026-06-19 02:30 UTC
• Quantifying 2026 Routinely Targeted Vulnerabilities (So Far)
  web:www.vulncheck.com

  VulnCheck identified 25 CVEs disclosed in 2026 that have been routinely targeted by adversaries and researchers so far this year, drawing from a global body of exploit code and exploitation data.

  2026-06-19 02:30 UTC
• Patch Tuesday June 2026: Security Updates & CVE Analysis
  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 02:30 UTC

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