CVE-2026-7978

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…

High · published May 6, 2026

CVSS v3.1
8.1
EPSS
0%
Percentile
23.4
In the wild
Unconfirmed
What it is

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)

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00318 · 23.4th percentile
Published
2026-05-06T18:12Z
EPSS history
Timeline
  • 06 MAY 18:12Z
    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…
    cvelistv5