CVE-2026-91734: Incorrect authorization in Core in Google Chrome on on Windows prior to 153.0.8010.47 allowed a local attacker

Q: How do I fix CVE-2026-91734?

chrome: upgrade to 153.0.8010.47. Exact commands for each OS are on this page.

Q: Is CVE-2026-91734 being exploited?

CVE-2026-91734 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-2026-91734 affect?

CVE-2026-91734 affects chrome. Severity is high (CVSS 7.4). Incorrect authorization in Core in Google Chrome on on Windows prior to 153.0.8010.47 allowed a local attacker to execute arbitrary code outside the sandbox via a local program. (Chromium security severity: High)

Routine

HIGH 7.4UPGRADE

CVE-2026-91734 is a high-severity flaw (CVSS 7.4) affecting chrome. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Incorrect authorization in Core in Google Chrome on on Windows prior to 153.0.8010.47 allowed a local attacker to execute arbitrary code outside the sandbox via a local program. (Chromium security severity: High)

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.4 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-863
Published	2026-09-15
Last modified	2026-09-17

Publisher (CNA): Chrome · Vendor: google

Last updated 2026-09-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-15 21:16 UTCPublished CVE record published
2026-09-17 16:03 UTCUpdated Record last modified

google chrome UPGRADE

Affected: < 153.0.8010.47

Fixed in: 153.0.8010.47

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 153.0.8010.47 (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-2026-91734?

chrome: upgrade to 153.0.8010.47. Exact commands for each OS are on this page.

Is CVE-2026-91734 being exploited?

CVE-2026-91734 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-2026-91734 affect?

CVE-2026-91734 affects chrome. Severity is high (CVSS 7.4). Incorrect authorization in Core in Google Chrome on on Windows prior to 153.0.8010.47 allowed a local attacker to execute arbitrary code outside the sandbox via a local program. (Chromium security severity: High)

How urgent is CVE-2026-91734?

Priority 26/100. High severity

Software pages

Windows vulnerabilities · Google Chrome vulnerabilities · Chromium vulnerabilities

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References

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