Cyber Resilience

CVE-2026-13803

High

Published: 30 June 2026

Published
30 June 2026
Modified
02 July 2026
KEV Added
—
Patch
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CVSS Score v3.1 8.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS Score 0.0030 22.1th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-13803 is a high-severity Type Confusion (CWE-843) vulnerability in Google Chrome. Its CVSS base score is 8.3 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 22.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

Type Confusion in Chrome Tabs in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)

CWE(s)
CWE-843

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
Why these techniques?

Type confusion enables sandbox escape after renderer compromise, directly facilitating client-side exploitation and privilege escalation.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

Affected Assets

google
chrome
≤ 150.0.7871.47

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References