CVE-2026-106378: Privilege elevation in Sandbox in Google Chrome on on Mac prior to 155.0.8059.39 allowed a remote attacker who

Q: How do I fix CVE-2026-106378?

chrome: upgrade to 155.0.8059.39. Exact commands for each OS are on this page.

Q: Is CVE-2026-106378 being exploited?

CVE-2026-106378 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-106378 affect?

CVE-2026-106378 affects chrome. Severity is high (CVSS 8.3). Privilege elevation in Sandbox in Google Chrome on on Mac prior to 155.0.8059.39 allowed a remote attacker who had compromised the renderer process to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security se

Routine

HIGH 8.3UPGRADE

CVE-2026-106378 is a high-severity flaw (CVSS 8.3) affecting chrome. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Privilege elevation in Sandbox in Google Chrome on on Mac prior to 155.0.8059.39 allowed a remote attacker who had compromised the renderer process to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.3 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-250
Published	2026-10-06
Last modified	2026-10-07

Publisher (CNA): Chrome · Vendor: google

Last updated 2026-10-07 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-06 19:18 UTCPublished CVE record published
2026-10-07 13:45 UTCUpdated Record last modified

google chrome UPGRADE

Affected: < 155.0.8059.39

Fixed in: 155.0.8059.39

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy chrome || rpm -q chrome || chrome --version

2. UPGRADE to 155.0.8059.39 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade chrome

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade chrome

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Advisories and coverage

Official advisories

Microsoft MSRC Update Guide: Chromium CVE-2026-106378: Privilege elevation 2026-10-16

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-106378?

chrome: upgrade to 155.0.8059.39. Exact commands for each OS are on this page.

Is CVE-2026-106378 being exploited?

CVE-2026-106378 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-106378 affect?

CVE-2026-106378 affects chrome. Severity is high (CVSS 8.3). Privilege elevation in Sandbox in Google Chrome on on Mac prior to 155.0.8059.39 allowed a remote attacker who had compromised the renderer process to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security se

How urgent is CVE-2026-106378?

Priority 35/100. High severity

Software pages

Google Chrome vulnerabilities · Chromium vulnerabilities

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References

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