Threat Intelligence / CVE / CVE-2026-3909

CVE-2026-3909 — Google Chrome

CISA KEV

CVSS v3.1 8.8 (HIGH) · EPSS 0.2% (higher than 49.9% of all scored CVEs) · Priority 9/10 · Published 2026-03-13

As of 2026-03-25, CVE-2026-3909 is a HIGH-severity vulnerability in Google Chrome, CVSS v3.1 8.8, EPSS 0.2% (49.9th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-03-13), with a US federal remediation deadline of 2026-03-27. Threadlinqs Intelligence links 2 tracked threat campaigns to CVE-2026-3909, most recently “Google Chrome Double Zero-Day — Skia OOB Write & V8 Implementation Flaw (CVE-2026-3909, CVE-2026-3910)”.

Last updated: 2026-03-25

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)

The record classifies CVE-2026-3909 under weakness class CWE-787. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 4 affected-product entries are recorded, across 4 vendors, listed below. The identifier was first published 184 days ago.

Severity and exploitation probability

CVSS v3.1 base score: 8.8 — HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (FIRST): 0.2% probability of exploitation in the next 30 days, higher than 49.9% of all scored CVEs
CISA KEV: Listed since 2026-03-13, federal remediation deadline 2026-03-27
Threadlinqs priority: 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
Published: 2026-03-13, last modified 2026-03-25

Is CVE-2026-3909 being exploited?

CISA added CVE-2026-3909 to the Known Exploited Vulnerabilities catalog on 2026-03-13, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-03-27 under BOD 22-01. It currently carries a trending score of 32 in the Threadlinqs vulnerability feed.

Affected products and versions

Google: Chrome
Apple: Macos
Linux: Kernel
Microsoft: Windows

How to fix CVE-2026-3909

The record marks a vendor fix as available for CVE-2026-3909. Vendor advisory: https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_13.html. Because CVE-2026-3909 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-03-27. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2026-3909

2 tracked threats in the Threadlinqs corpus reference CVE-2026-3909, either in the campaign’s CVE list or as an indicator on the campaign record.

Google Chrome Double Zero-Day — Skia OOB Write & V8 Implementation Flaw (CVE-2026-3909, CVE-2026-3910) — CRITICAL · 2026-03-15
Chrome V8 and Skia Zero-Days Under Active Exploitation (CVE-2026-3910, CVE-2026-3909) — CRITICAL · 2026-03-13

Sources

Seeded from threadlinqs-intel and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

Full detection coverage & IOCs for threats exploiting CVE-2026-3909 are available via the Threadlinqs MCP server (Purple tier). View plans →

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