Security readout for executives and security teams
Plain-English summary
CVE-2026-3909 is a high-severity Chrome browser memory corruption flaw in Skia. A user visiting a malicious or compromised HTML page could trigger out-of-bounds memory access. The practical business risk is browser compromise on endpoints that have not updated to Chrome 146.0.7680.75 or later.
Executive priority
High priority for routine emergency patching of Chrome endpoints. User interaction is required, but browser flaws are broadly exposed through normal web activity and can affect confidentiality, integrity, and availability. No source provided here confirms active exploitation.
Technical view
The CVE describes an out-of-bounds write, CWE-787, in Skia affecting Google Chrome before 146.0.7680.75. The CVSS 3.1 score is 8.8 with network attack vector, low complexity, no privileges required, and user interaction required. Impact is rated high for confidentiality, integrity, and availability.
Likely exposure
Exposure is primarily desktop systems running Google Chrome versions prior to 146.0.7680.75. The source bundle does not identify other affected Chromium-based products, platforms, or embedded uses, so those should not be assumed from the provided evidence.
Exploitation context
The described attack path requires a victim to load a crafted HTML page. The provided CISA KEV signal is false, and the supplied sources do not state active exploitation. Treat this as a serious browser update priority, not as confirmed in-the-wild exploitation.
Researcher notes
Key details are limited to the CVE description and Chrome release reference. The Chromium issue may have restricted details. Do not infer exploitability beyond the stated crafted HTML page vector and CVSS metrics. Monitor vendor notes for additional technical detail or related fixes.
Mitigation direction
- Update Google Chrome to 146.0.7680.75 or later.
- Prioritize managed desktop and laptop fleets with internet browsing exposure.
- Use enterprise browser management to enforce update compliance.
- Check Google Chrome release guidance for any platform-specific update details.
Validation and detection
- Inventory Chrome versions across managed endpoints.
- Confirm systems report Chrome 146.0.7680.75 or later.
- Review browser management dashboards for update failures.
- Check CISA KEV status before incident escalation decisions.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-3909 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://issues.chromium.org/issues/491421267CVE reference
- https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_13.htmlCVE reference
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-3909CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.