CVE-2026-8563: Insufficient policy enforcement in IFrame Sandbox in Google Chrome on Windows prior to 148.0.7778.168 allowed

Q: How do I fix CVE-2026-8563?

chrome: upgrade to 148.0.7778.168. Exact commands for each OS are on this page.

Q: Is CVE-2026-8563 being exploited?

CVE-2026-8563 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-2026-8563 affect?

CVE-2026-8563 affects chrome. Severity is medium (CVSS 4.3). Insufficient policy enforcement in IFrame Sandbox in Google Chrome on Windows prior to 148.0.7778.168 allowed a remote attacker to bypass navigation restrictions via a crafted HTML page. (Chromium security severity: Medium)

Q: How urgent is CVE-2026-8563?

Priority 17/100. No elevated risk signals yet.

Routine

MEDIUM 4.3UPGRADE

CVE-2026-8563 is a medium-severity flaw (CVSS 4.3) affecting chrome. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Insufficient policy enforcement in IFrame Sandbox in Google Chrome on Windows prior to 148.0.7778.168 allowed a remote attacker to bypass navigation restrictions via a crafted HTML page. (Chromium security severity: Medium)

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-693
Published	2026-05-14
Last modified	2026-10-26

Publisher (CNA): Chrome · Vendor: google

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-14 20:17 UTCPublished CVE record published
2026-10-26 00:10 UTCUpdated Record last modified

google chrome UPGRADE

Affected: < 148.0.7778.168

Fixed in: 148.0.7778.168

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 148.0.7778.168 (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-2026-8563?

chrome: upgrade to 148.0.7778.168. Exact commands for each OS are on this page.

Is CVE-2026-8563 being exploited?

CVE-2026-8563 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-2026-8563 affect?

CVE-2026-8563 affects chrome. Severity is medium (CVSS 4.3). Insufficient policy enforcement in IFrame Sandbox in Google Chrome on Windows prior to 148.0.7778.168 allowed a remote attacker to bypass navigation restrictions via a crafted HTML page. (Chromium security severity: Medium)

How urgent is CVE-2026-8563?

Priority 17/100. No elevated risk signals yet.

Software pages

Windows vulnerabilities · Google Chrome vulnerabilities · Chromium vulnerabilities

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References

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