CVE-2026-113311: Use after free in ServiceWorker in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to execute a

Q: How do I fix CVE-2026-113311?

chrome: upgrade to 156.0.8078.47. Exact commands for each OS are on this page.

Q: Is CVE-2026-113311 being exploited?

CVE-2026-113311 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-2026-113311 affect?

CVE-2026-113311 affects chrome. Severity is high (CVSS 8.8). Use after free in ServiceWorker in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

This month

HIGH 8.8UPGRADE

CVE-2026-113311 is a high-severity flaw (CVSS 8.8) affecting chrome. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Use after free in ServiceWorker in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code inside 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	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-416
Published	2026-10-20
Last modified	2026-10-21

Publisher (CNA): Chrome · Vendor: google

Last updated 2026-10-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-20 22:19 UTCPublished CVE record published
2026-10-21 17:05 UTCUpdated Record last modified

google chrome UPGRADE

Affected: < 156.0.8078.47

Fixed in: 156.0.8078.47

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 156.0.8078.47 (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.

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-2026-113311?

chrome: upgrade to 156.0.8078.47. Exact commands for each OS are on this page.

Is CVE-2026-113311 being exploited?

CVE-2026-113311 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-2026-113311 affect?

CVE-2026-113311 affects chrome. Severity is high (CVSS 8.8). Use after free in ServiceWorker in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

How urgent is CVE-2026-113311?

Priority 40/100. High severity

Software pages

Google Chrome vulnerabilities · Chromium vulnerabilities

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References

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