major vulnerability· requires attention

Chrome is widely deployed; this sandbox-escape RCE can lead to host compromise across organizations and warrants broad IT attention.

Applications

CVE-2026-91743

8.3

High

EPSS 0.25%Patch available

Chrome race condition allows sandbox escape and arbitrary code execution (RCE).

exploited

No known exploitation not in CISA KEV as of our last sync

fix

Patch available see the advisory in the references

likelihood

EPSS 0.25%top 84% of scored CVEs

Published 15 Sept 2026Analysed here 17 Sept 2026CVSS scored by CISA

common questions

Is CVE-2026-91743 being exploited?

Not confirmed. CVE-2026-91743 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.25% probability of exploitation in the next 30 days.

How severe is CVE-2026-91743?

CVE-2026-91743 is rated High with a CVSS score of 8.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.

Is there a patch for CVE-2026-91743?

Yes. A fix has been recorded for CVE-2026-91743. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.

What does CVE-2026-91743 affect?

CVE-2026-91743 affects Google Chrome versions prior to 153.0.8010.47 (desktop). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

What should I do about CVE-2026-91743?

Update Chrome to 153.0.8010.47 or later immediately.

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

executive summary

technical analysis

affected

Google Chrome versions prior to 153.0.8010.47 (desktop)

impact

Attacker who controls the renderer can escape the sandbox and execute arbitrary code on the host via crafted HTML, enabling full host compromise.

action required

Immediate action required

affected versions

Google Chrome

affected< 153.0.8010.47

As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.

cisa ssvc

exploitation: none
automatable: no
technical impact: total

Assessed by CISA 16 Sept 2026 (SSVC 2.0.3).

timeline

15 Sept 2026Published
16 Sept 2026CISA SSVC assessment: exploitation none · same day later
17 Sept 2026CVE record last updated · 1 day later
17 Sept 2026Analysed by vulneraibility.com · same day later

how to fix

Remediation steps are tailored for users whose stack is affected. Add this technology to your stack to see the fix checklist.

references

NVD CVE.org CVE Details Source

2 references in the CVE record: 2 links

Linkchromereleases.googleblog.com /2026/09/stable-channel-update-for-desktop_0541751186.html
Linkissues.chromium.org /issues/516947138

sources

CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
NVD: CVSS and CPE data
CISA Vulnrichment (ADP): SSVC decision points
FIRST EPSS: exploit probability and percentile
Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.

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