CVE-2026-7969 Overview
CVE-2026-7969 is an integer overflow vulnerability in the Network component of Google Chrome versions prior to 148.0.7778.96. The flaw allows a remote attacker who has already compromised the renderer process to bypass the same-origin policy through a crafted HTML page. Google's Chromium project rated the security severity as Medium. The vulnerability is tracked under CWE-472: External Control of Assumed-Immutable Web Parameter and affects Chrome on Windows, macOS, and Linux platforms. User interaction is required for exploitation, and the impact is limited to confidentiality.
Critical Impact
A compromised renderer process can leverage this integer overflow to bypass same-origin policy enforcement, enabling cross-origin data access through a crafted HTML page.
Affected Products
- Google Chrome versions prior to 148.0.7778.96
- Chrome on Microsoft Windows
- Chrome on Apple macOS and Linux
Discovery Timeline
- 2026-05-06 - CVE-2026-7969 published to NVD
- 2026-05-07 - Last updated in NVD database
Technical Details for CVE-2026-7969
Vulnerability Analysis
The vulnerability resides in the Network component of Chromium, which manages HTTP requests, response handling, and origin enforcement between the browser process and renderer processes. An integer overflow occurs when arithmetic operations on size or length values exceed the bounds of their underlying integer type. In this case, the overflow corrupts assumed-immutable parameters that the Network stack uses to enforce origin boundaries.
Exploitation requires an attacker to first compromise the renderer process through a separate flaw, since the renderer is sandboxed and cannot directly access cross-origin data. Once the renderer is under attacker control, the integer overflow is triggered to manipulate request or response metadata that the Network stack treats as trustworthy. This breaks the security boundary that isolates web origins from one another.
Root Cause
The root cause is improper validation of integer arithmetic on values that influence same-origin policy decisions in the Network component. The classification under CWE-472 indicates that web parameters assumed to be immutable can be altered through the overflow, causing downstream origin checks to operate on attacker-controlled data.
Attack Vector
The attack vector is network-based and requires user interaction, typically the act of visiting a malicious or compromised web page. The attacker must chain this flaw with a separate renderer compromise. After the renderer is compromised, the crafted HTML page triggers the integer overflow to read data from origins the user is authenticated to. See the Chromium Issue Tracker entry 497450574 for the upstream technical record.
No public proof-of-concept code is available, and no exploit-in-the-wild has been confirmed. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.
Detection Methods for CVE-2026-7969
Indicators of Compromise
- Chrome browser processes running versions earlier than 148.0.7778.96 after the patch release date.
- Renderer processes generating anomalous network requests to origins unrelated to the active browsing context.
- Unexpected cross-origin response data appearing in renderer telemetry or DevTools network logs.
Detection Strategies
- Inventory installed Chrome versions across managed endpoints and flag any build below 148.0.7778.96.
- Monitor for renderer process anomalies such as unexpected child process spawns, unusual memory allocations, or crash signatures referencing the Network component.
- Correlate browser exploitation indicators with subsequent outbound connections that suggest data exfiltration from cross-origin contexts.
Monitoring Recommendations
- Enable browser telemetry forwarding to a centralized log platform and alert on Chrome crash reports tagged to net:: modules.
- Track outbound HTTPS requests originating from browser processes for unexpected destinations or atypical request patterns.
- Review endpoint detection telemetry for renderer sandbox escape precursors that often precede exploitation of this class of flaw.
How to Mitigate CVE-2026-7969
Immediate Actions Required
- Update Google Chrome to version 148.0.7778.96 or later on all Windows, macOS, and Linux endpoints.
- Verify update deployment through enterprise management consoles such as Chrome Browser Cloud Management or endpoint configuration tools.
- Restart Chrome on user endpoints to ensure the patched binary is loaded into memory.
Patch Information
Google released the fix in the stable channel update documented in the Google Chrome Release Update. Chromium-based browsers such as Microsoft Edge, Brave, and Opera typically incorporate the same upstream patch; administrators should confirm patched versions for each browser in use.
Workarounds
- Restrict execution of untrusted web content through enterprise policies that limit JavaScript on unknown domains.
- Deploy Chrome site isolation policies and ensure --site-per-process remains enabled to reduce the impact of renderer compromise.
- Educate users to avoid clicking links from untrusted sources, since exploitation requires user interaction with a crafted page.
# Verify installed Chrome version on Linux
google-chrome --version
# Verify installed Chrome version on macOS
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --version
# Verify installed Chrome version on Windows (PowerShell)
(Get-Item "C:\Program Files\Google\Chrome\Application\chrome.exe").VersionInfo.ProductVersion
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
