CVE-2026-7978

Name: CVE-2026-7978
Creator: NVD / NIST
Published: 2026-05-06T19:16:48.67+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2026-7978 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. Inappropriate implementation in Companion in Google Chrome on Mac prior to 148.0.7778.96 allowed a remote attacker to perform OS-level privilege escalation via malicious network traffic. (Chromium security severity: Medium). EPSS estimates a 0.24% chance of exploitation in the next 30 days.

Description

Inappropriate implementation in Companion in Google Chrome on Mac prior to 148.0.7778.96 allowed a remote attacker to perform OS-level privilege escalation via malicious network traffic. (Chromium security severity: Medium)

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

0.24%

14.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-693

Affected Software

Vendor	Product	Versions
Google	Chrome	< 148.0.7778.96

References

https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop.htmlVendor Advisory
https://issues.chromium.org/issues/497828892Issue Tracking, Permissions Required

Timeline

Published: May 6, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-7978?

How severe is CVE-2026-7978?

CVE-2026-7978 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2026-7978?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-7978?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST