CVE-2026-78983 Overview
CVE-2026-78983 is a use-after-free vulnerability [CWE-416] in the Views component of Google Chrome prior to version 152.0.7977.65. An attacker who has already compromised the renderer process can leverage a crafted HTML page to execute arbitrary code outside the Chrome sandbox. This constitutes a sandbox escape, elevating attacker capabilities from the constrained renderer to the broader browser process context. Google tracks the underlying defect as Chromium issue 519369088 and rates its Chromium security severity as Medium. The National Vulnerability Database assigns a higher CVSS score reflecting the potential impact of sandbox escape on confidentiality, integrity, and availability.
Critical Impact
Successful exploitation chains renderer compromise with a sandbox escape, granting arbitrary code execution outside the browser sandbox on the victim host.
Affected Products
- Google Chrome versions prior to 152.0.7977.65 on desktop platforms
- Chromium-based browsers embedding vulnerable Views code before the corresponding upstream patch
- Downstream distributions bundling pre-patch Chromium builds
Discovery Timeline
- 2026-08-25 - CVE-2026-78983 published to NVD
- 2026-08-27 - Last updated in NVD database
Technical Details for CVE-2026-78983
Vulnerability Analysis
The defect resides in the Views UI framework, which Chrome uses to render browser chrome elements and host cross-process UI logic. A use-after-free condition occurs when code retains a pointer to a Views object after the underlying allocation has been released. Subsequent access to that dangling pointer permits an attacker to reuse the freed memory region for controlled data.
Because Views runs in the privileged browser process, corrupting object state there enables execution outside the renderer sandbox. The attacker must first hold a compromised renderer, typically obtained through a separate renderer bug triggered by a crafted HTML page. Exploitation requires user interaction and involves a scope change from the renderer to the browser process. Google patched the flaw in Chrome Stable 152.0.7977.65.
Root Cause
The root cause is object lifetime mismanagement inside the Views component. A reference to a Views-managed object persists after the allocation is freed, producing a dangling pointer usable by attacker-controlled code paths reachable from a compromised renderer.
Attack Vector
Exploitation is network-reachable and delivered through a crafted HTML page. The attacker chains a prior renderer compromise with the Views use-after-free to cross the sandbox boundary. High attack complexity and required user interaction constrain casual mass exploitation, but the vulnerability remains viable inside targeted browser exploit chains.
No public proof-of-concept, exploit code, or evidence of in-the-wild exploitation is currently associated with this identifier. Google has not published deeper technical details; see the Chromium Issue Tracker #519369088 for status updates.
Detection Methods for CVE-2026-78983
Indicators of Compromise
- Chrome browser processes spawning unexpected child processes such as command shells, scripting hosts, or LOLBins immediately after browsing activity
- Anomalous file writes or persistence artifacts created by chrome.exe outside standard profile and cache directories
- Outbound network connections from the Chrome browser process to unfamiliar infrastructure following visits to untrusted pages
Detection Strategies
- Inventory Chrome installations across the fleet and flag any version below 152.0.7977.65 as vulnerable
- Baseline normal Chrome parent-child process relationships and alert on deviations, particularly non-renderer child processes
- Correlate browser crash telemetry with subsequent process creation or credential access events on the same host
Monitoring Recommendations
- Ingest endpoint process, file, and network telemetry into a centralized data lake for cross-source correlation
- Track Chrome update posture as a continuous control rather than a one-time check, given Chromium's frequent security releases
- Monitor the Google Chrome Stable Update feed to detect newly disclosed browser flaws
How to Mitigate CVE-2026-78983
Immediate Actions Required
- Update Chrome to version 152.0.7977.65 or later on all managed endpoints
- Force-restart running Chrome instances so the patched binary is loaded into memory
- Audit third-party Chromium-based browsers and Electron applications for equivalent Views updates
Patch Information
Google addressed CVE-2026-78983 in Chrome Stable channel 152.0.7977.65 for desktop. Details are available in the Google Chrome Stable Update advisory. Enterprises using Chrome Enterprise policies should validate that auto-update is enabled and that the TargetVersionPrefix policy does not pin builds below the fixed version.
Workarounds
- No vendor-supplied workaround exists; patching is the supported remediation path
- Reduce exposure by restricting browsing to trusted sites and enforcing site isolation policies while patches roll out
- Deploy application allowlisting to block unauthorized child processes spawned by chrome.exe
# Verify installed Chrome version on Windows endpoints
reg query "HKLM\SOFTWARE\Google\Chrome\BLBeacon" /v version
# Verify installed Chrome version on macOS endpoints
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --version
# Verify installed Chrome version on Linux endpoints
google-chrome --version
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
