How severe is CVE-2026-3909?

CVE-2026-3909 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-3909 being actively exploited?

Yes. CVE-2026-3909 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-03-13, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2026-3909?

CVE-2026-3909 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3909?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2026-3909 have an EU (EUVD) identifier?

Yes. CVE-2026-3909 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11734. It is also flagged as exploited in the EUVD (since 2026-03-13).

When was CVE-2026-3909 published?

CVE-2026-3909 was published on 2026-03-13 and last updated on 2026-06-17.

CVE-2026-3909

CVE-2026-3909 is a high-severity vulnerability in Google Chrome with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2026-03-13). The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Yes — listed in CISA KEV (added 2026-03-13)
EU (EUVD) id: EUVD-2026-11734
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2026-03-13)
Weakness: CWE-787
Affected product: Google Chrome
Published: 2026-03-13
Last modified: 2026-06-17

Description

Out of bounds write in Skia in Google Chrome prior to 146.0.7680.75 allowed a remote attacker to perform out of bounds memory access via a crafted HTML page. (Chromium security severity: High)

Frequently asked questions

What is CVE-2026-3909?: Out of bounds write in Skia in Google Chrome prior to 146.0.7680.75 allowed a remote attacker to perform out of bounds memory access via a crafted HTML page. (Chromium security severity: High)
How severe is CVE-2026-3909?: CVE-2026-3909 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-3909 being actively exploited?: Yes. CVE-2026-3909 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-03-13, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2026-3909?: CVE-2026-3909 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3909?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2026-3909 have an EU (EUVD) identifier?: Yes. CVE-2026-3909 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11734. It is also flagged as exploited in the EUVD (since 2026-03-13).
When was CVE-2026-3909 published?: CVE-2026-3909 was published on 2026-03-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

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