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)
Published: 2026-05-06
Score: 8.1 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-6250-1 chromium security update
History

Sat, 09 May 2026 00:15:00 +0000

Type Values Removed Values Added
Title Privilege Escalation via Improper Implementation in Chrome Companion on macOS chromium-browser: Inappropriate implementation in Companion
Weaknesses CWE-266
References
Metrics threat_severity

None

threat_severity

Moderate


Thu, 07 May 2026 03:30:00 +0000

Type Values Removed Values Added
Title Privilege Escalation via Improper Implementation in Chrome Companion on macOS

Thu, 07 May 2026 01:15:00 +0000

Type Values Removed Values Added
Title Privilege Escalation via Malicious Network Traffic in Chrome Companion on Mac
Weaknesses CWE-264

Wed, 06 May 2026 23:30:00 +0000

Type Values Removed Values Added
First Time appeared Apple
Apple macos
CPEs cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*
Vendors & Products Apple
Apple macos

Wed, 06 May 2026 22:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-693
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 06 May 2026 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Google
Google chrome
Vendors & Products Google
Google chrome

Wed, 06 May 2026 20:45:00 +0000

Type Values Removed Values Added
Title Privilege Escalation via Malicious Network Traffic in Chrome Companion on Mac
Weaknesses CWE-264

Wed, 06 May 2026 18:30:00 +0000

Type Values Removed Values Added
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)
References

cve-icon MITRE

Status: PUBLISHED

Assigner: Chrome

Published:

Updated: 2026-05-07T03:57:00.415Z

Reserved: 2026-05-05T22:59:25.764Z

Link: CVE-2026-7978

cve-icon Vulnrichment

Updated: 2026-05-06T21:36:50.696Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-06T19:16:48.670

Modified: 2026-05-06T23:23:59.177

Link: CVE-2026-7978

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-05-05T00:00:00Z

Links: CVE-2026-7978 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-05-09T04:45:26Z

Weaknesses