CVE-2026-110919: 
Google Chrome vulnerability analysis and mitigation

CVE-2026-110919 is a use-after-free vulnerability in the V8 JavaScript engine of Google Chrome that allows a remote attacker to execute arbitrary code inside the Chrome sandbox via a crafted HTML page. It affects all Google Chrome versions prior to 155.0.8059.84 on Windows, Mac, and Linux. The vulnerability was reported by Xinyang Ge on 2026-10-02 and publicly disclosed on 2026-10-15 alongside the Chrome 155.0.8059.84 stable channel release. It carries a CVSS v3.1 base score of 8.8 (High) (Chrome Releases, GitHub Advisory).

The vulnerability is classified as CWE-416 (Use After Free) and CWE-825 (Expired Pointer Dereference), rooted in improper memory management within Chrome's V8 JavaScript engine. After a memory object is freed, V8 may continue to reference or operate on that memory region; if the freed memory is subsequently reallocated, an attacker can manipulate the reused memory to redirect execution flow. Exploitation requires user interaction — specifically, a victim visiting a malicious or attacker-controlled HTML page — but requires no authentication or special privileges. The Chromium issue tracker references bug ID 568831769 for this vulnerability (Chrome Releases, Red Hat Bugzilla).

Successful exploitation allows a remote attacker to execute arbitrary code within the Chrome sandbox, achieving high confidentiality, integrity, and availability impact on the affected browser process. While execution is constrained to the sandbox, this can serve as a stepping stone for sandbox escape chains when combined with additional vulnerabilities. Affected users risk data theft from browser memory, session hijacking, and potential further compromise of the underlying system if chained with a sandbox escape (GitHub Advisory, Red Hat Bugzilla).

As of the time of disclosure, there is no public proof-of-concept exploit and no evidence of in-the-wild exploitation (Feedly). The EPSS score is reported at 0.0, reflecting low current exploitation probability. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. Exploitation requires user interaction (visiting a crafted HTML page), which somewhat limits opportunistic mass exploitation, though drive-by download campaigns remain a realistic delivery vector.

1. Reconnaissance: Identify target users running Google Chrome versions prior to 155.0.8059.84 on Windows, Mac, or Linux.
2. Craft malicious HTML page: Develop a specially crafted HTML/JavaScript page that triggers the use-after-free condition in Chrome's V8 engine by manipulating object lifecycle — allocating, freeing, and then accessing a JavaScript object in a way that causes V8 to reference freed memory.
3. Host the payload: Deploy the malicious page on an attacker-controlled web server or inject it into a compromised legitimate site to maximize reach.
4. Deliver to victim: Lure the target into visiting the malicious URL via phishing email, malicious advertisement, or social engineering.
5. Trigger UAF and achieve code execution: When the victim's browser processes the crafted page, the use-after-free condition is triggered in V8, allowing the attacker to corrupt memory and redirect execution to attacker-controlled code running within the Chrome sandbox.
6. Post-exploitation (sandbox-constrained): From within the sandbox, the attacker may attempt to exfiltrate browser data, steal cookies/session tokens, or chain with a sandbox escape vulnerability for full system compromise (Chrome Releases, GitHub Advisory).

• Network: Unusual outbound connections from the Chrome browser process to unknown or suspicious IP addresses/domains following a web page visit; HTTP/HTTPS requests to newly registered or low-reputation domains serving JavaScript-heavy content.
• Process: Chrome renderer processes (chrome.exe, chrome on Linux/Mac) spawning unexpected child processes or exhibiting abnormal memory usage; renderer crashes (crash dumps) in V8-related components.
• Logs: Browser crash reports referencing V8 heap corruption or use-after-free errors; Chrome crash dump files (.dmp) generated around the time of a suspicious page visit.
• File System: Unexpected files written to the user's temp directory or Chrome profile directory by the renderer process; new executables or scripts dropped in user-writable locations shortly after browser activity.

Google has released Chrome version 155.0.8059.84 (Linux) and 155.0.8059.84/.85 (Windows/Mac) which addresses this vulnerability. Users should update Chrome immediately via the built-in updater (Settings → Help → About Google Chrome) or by downloading the latest version from the official Chrome website. Enabling automatic updates ensures timely receipt of future security patches. Organizations managing Chrome deployments via policy should push the update through their endpoint management tools without delay (Chrome Releases).

The vulnerability was part of a broader Chrome 155 security update that included 10 fixes, with one rated Critical (CVE-2026-110922) and several rated High, drawing attention to the volume of memory safety issues addressed in a single release. Red Hat tracked the issue via their security response process (Bugzilla bug 2553882), indicating downstream Linux distribution impact. The Chromium security team noted that bug details would remain restricted until a majority of users are updated, a standard practice to limit exploitation risk during the patch rollout window (Chrome Releases, Red Hat Bugzilla).