CVE-2026-9958

FAUCET Score

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)

First published: May 28, 2026Last modified: May 28, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 148.0.7778.216CPE matchmatch criteria	cpe:2.3:a:google:chrome::::::::
		< 148.0.7778.215CPE matchmatch criteria	cpe:2.3:a:google:chrome::::::::
		>= 148.0.7778.216, < 148.0.7778.216CPE match	cpe:2.3:a:google:chrome::::::::

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

Exploitability Score

2.8

Impact Score

5.9

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.22%

Probability of exploitation in next 30 days

EPSS Percentile

13.2%

Percentile rank of EPSS score among Peer Group

As of 2026-07-28

Model: v2026.06.15

This CVE's current EPSS score of 0.0022 is in the 13th percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

microsoftpatch availablevia msrc

Product: Microsoft Edge (Chromium-based)Fixed in: 148.0.3967.96

Vendor Advisories (1)

microsoft2026-May/CVE-2026-9958

Chromium: CVE-2026-9958 Use after free in PDFium

May 12, 2026

References

chromereleases.googleblog.com / 2026/05/stable-channel-update-for-desktop_0877304591.html

Release Notes

issues.chromium.org / issues/504555886

Permissions RequiredVendor Advisory