Vulnerability details

CVE-2026-7978

Google Chrome

CVSS 3.1

8.1High

Official 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)

CVSS scores

Score	Version	Source	Vector
8.1High	3.1	CISA ADP / Vulnrichment (CISA-ADP)	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
Google	Chrome	148.0.7778.96 ≤ v < 148.0.7778.96	CVEProject cvelistV5 (CNA)

References and advisories

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Details

Published: 2026-05-06
Last updated: 2026-05-07
State: Published
Assigner (CNA): Chrome

Exploit prediction (EPSS)

0.23%

Probability of exploitation in 30 days

14.7%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-693
Protection Mechanism Failure