Detect CVE-2026-3910: Google Chromium V8 Memory Buffer Bounds Violation in IBM QRadar
Detects exploitation attempts and post-exploitation indicators related to CVE-2026-3910, an improper restriction of operations within the bounds of a memory buffer (CWE-119) in Google Chromium's V8 JavaScript engine. This vulnerability is actively exploited in the wild (CISA KEV) and may allow attackers to achieve remote code execution via a malicious web page, potentially leading to sandbox escape and full system compromise.
MITRE ATT&CK
QRadar Detection Query
SELECT
DATEFORMAT(starttime,'YYYY-MM-dd HH:mm:ss') AS event_time,
sourceip,
destinationip,
destinationport,
username,
"Process Name",
"Parent Process Name",
QIDNAME(qid) AS event_name,
logsourcename(logsourceid) AS log_source
FROM events
WHERE
LOGSOURCETYPENAME(devicetype) IN ('Microsoft Windows Security Event Log','CrowdStrike Falcon')
AND (
(
LOWER("Parent Process Name") LIKE '%chrome.exe'
OR LOWER("Parent Process Name") LIKE '%msedge.exe'
)
AND LOWER("Process Name") IN ('cmd.exe','powershell.exe','wscript.exe','cscript.exe','mshta.exe','rundll32.exe','regsvr32.exe','certutil.exe')
)
AND starttime > NOW() - 7 DAYS
ORDER BY starttime DESC
LAST 7 DAYSQRadar AQL query identifying Chrome or Edge browser processes spawning high-risk child processes that are commonly abused in post-exploitation scenarios following V8 memory corruption vulnerabilities.
Data Sources
Required Tables
False Positives & Tuning
- Automated testing pipelines using headless Chrome that invoke shell commands as part of CI/CD workflows
- Browser-based kiosk applications with embedded shell execution for management tasks
- Legitimate enterprise applications that use Chrome as an embedded browser and spawn child processes for functionality
- Security awareness training platforms that may simulate browser-based attack scenarios
Other platforms for CVE-2026-3910
Testing Methodology
Validate this detection against 4 adversary techniques from Atomic Red Team. Each test below lists the behaviour to exercise and the telemetry you should expect to see. Executable commands and cleanup steps are available with Pro.
- Test 1Simulate Chrome Spawning PowerShell Child Process
Expected signal: Sysmon EventID 1 showing powershell.exe with ParentImage chrome.exe; DeviceProcessEvents alert in MDE; CrowdStrike ProcessRollup2 with ParentBaseFileName=chrome.exe and FileName=powershell.exe
- Test 2Simulate Chrome Spawning certutil for Payload Download
Expected signal: Sysmon EventID 1 with ParentImage chrome.exe and Image certutil.exe; network connection attempt to 127.0.0.1:8080; file creation event in C:\Windows\Temp\
- Test 3Simulate Chrome Crash with Access Violation Exception
Expected signal: Windows Application EventLog EventID 1000 with Faulting application name matching the test process; exception code 0xC0000005 (STATUS_ACCESS_VIOLATION) visible in event data
- Test 4Simulate Anomalous Outbound Connection from Chrome Process
Expected signal: Network flow log showing outbound TCP SYN to 203.0.113.1:4444 (TEST-NET-3, RFC 5737 — safe for testing); process name visible in socket tracking if using eBPF-based EDR
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Get the full detection package for CVE-2026-3910 including response playbook, investigation guide, and atomic red team tests.