CVE-2026-118321: Improper input validation in Core in Google Chrome on on Android prior to 156.0.8078.73 allowed a remote attac

Q: How do I fix CVE-2026-118321?

chrome: upgrade to 156.0.8078.73. Exact commands for each OS are on this page.

Q: Is CVE-2026-118321 being exploited?

CVE-2026-118321 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-2026-118321 affect?

CVE-2026-118321 affects chrome. Severity is critical (CVSS 9.6). Improper input validation in Core in Google Chrome on on Android prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)

Q: How urgent is CVE-2026-118321?

Priority 40/100. Critical severity

This month

CRITICAL 9.6UPGRADE

CVE-2026-118321 is a critical-severity flaw (CVSS 9.6) affecting chrome. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper input validation in Core in Google Chrome on on Android prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.6 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 74%)
CISA exploited list	No
Weakness	CWE-20
Published	2026-10-27
Last modified	2026-10-29

Publisher (CNA): Chrome · Vendor: google

Last updated 2026-10-29 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-27 23:17 UTCPublished CVE record published
2026-10-29 17:41 UTCUpdated Record last modified

google chrome UPGRADE

Affected: < 156.0.8078.73

Fixed in: 156.0.8078.73

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 156.0.8078.73 (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

Research and news

Vulners Bulletins: CVE-2026-118321 2026-10-27

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-2026-118321?

chrome: upgrade to 156.0.8078.73. Exact commands for each OS are on this page.

Is CVE-2026-118321 being exploited?

CVE-2026-118321 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-2026-118321 affect?

CVE-2026-118321 affects chrome. Severity is critical (CVSS 9.6). Improper input validation in Core in Google Chrome on on Android prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)

How urgent is CVE-2026-118321?

Priority 40/100. Critical severity

Software pages

Android vulnerabilities · Google Chrome vulnerabilities · Chromium vulnerabilities

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References

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