CVE-2026-6296
Published: 15 April 2026
Summary
CVE-2026-6296 is a critical-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Google Chrome. Its CVSS base score is 9.6 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); ranked at the 7.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-2 (Flaw Remediation) and SC-39 (Process Isolation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Mandates timely identification, reporting, and patching of flaws like the heap buffer overflow in Chrome's ANGLE component to prevent exploitation.
Implements memory protections such as ASLR and DEP to mitigate unauthorized code execution from heap buffer overflows in browser components.
Enforces process isolation for browser renderer processes to limit the impact of sandbox escapes triggered by crafted HTML pages.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Heap buffer overflow in Chrome ANGLE enables RCE via malicious website (T1203 Exploitation for Client Execution) and sandbox escape for privilege escalation (T1068).
NVD Description
Heap buffer overflow in ANGLE in Google Chrome prior to 147.0.7727.101 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)
Deeper analysisAI
CVE-2026-6296 is a heap buffer overflow vulnerability (CWE-122) in the ANGLE graphics component within Google Chrome versions prior to 147.0.7727.101. ANGLE serves as an implementation of OpenGL ES on Windows and other platforms in Chromium-based browsers. The issue carries a CVSS v3.1 base score of 9.6 (AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H) and is classified as Critical by Chromium security standards.
A remote attacker can exploit this vulnerability by tricking a user into visiting a malicious website containing a crafted HTML page. The heap buffer overflow enables potential sandbox escape, allowing the attacker to bypass Chrome's security boundaries. Successful exploitation requires user interaction but no privileges, with low attack complexity over the network, leading to high impacts on confidentiality, integrity, and availability due to the changed scope.
Mitigation is available in Google Chrome version 147.0.7727.101 and later, as detailed in the stable channel update announced on the Chrome Releases blog at https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop_15.html. Additional technical details are provided in the Chromium issue tracker at https://issues.chromium.org/issues/490170083. Security practitioners should prioritize updating affected browsers to patch this critical flaw.
Details
- CWE(s)