CVE-2026-7978

8.1 HIGH 0.2% exploit odds Fix listed Auth & access Browser & mail

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)

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
Exploit odds: 0.2% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-05-06 19:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-10-26 19:10 UTC Last updatedMost recent change to the record

Details

Published: 2026-05-06 19:16 UTC
Last modified: 2026-10-26 19:10 UTC
Exploit probability: 0.2% · EPSS, next 30 days
Weakness: CWE-693
Record status: Analyzed

Affected

Google Chrome < 148.0.7778.96

Attack profile CVSS 3.1 · 8.1

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Raw vector

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

Download Square Reddit

Fix and advisories

https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop.html

References

NVD record · CVE.org record