CVE-2025-11207 Overview
CVE-2025-11207 is a side-channel information leakage vulnerability in the Storage component of Google Chrome versions prior to 141.0.7390.54. A remote attacker can perform arbitrary read and write operations through a crafted HTML page. Google classified the Chromium security severity as Medium. The flaw is tracked under [CWE-1300] (Improper Protection of Physical Side Channels) and [CWE-125] (Out-of-Bounds Read). Successful exploitation requires only that a victim visit an attacker-controlled web page, with no user interaction or privileges beyond browsing.
Critical Impact
Remote attackers can leverage a crafted HTML page to trigger side-channel leakage in Chrome Storage, enabling arbitrary read/write access to sensitive browser data across affected desktop platforms.
Affected Products
- Google Chrome prior to 141.0.7390.54
- Google Chrome on Microsoft Windows
- Google Chrome on Apple macOS and Linux
Discovery Timeline
- 2025-11-06 - CVE-2025-11207 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-11207
Vulnerability Analysis
The vulnerability resides in the Storage subsystem of Chromium, which manages browser storage APIs such as IndexedDB, Cache Storage, and related persistence mechanisms. A side-channel condition in this component allows a crafted HTML page to observe or influence memory that should remain isolated between origins or processes. The result is arbitrary read/write behavior initiated purely from web content. Because the attack vector is network-based and requires no authentication or user interaction beyond page load, drive-by exploitation from malicious or compromised sites is realistic. The Exploit Prediction Scoring System (EPSS) currently rates this issue at 0.243%.
Root Cause
The underlying defect combines [CWE-1300] improper protection of a physical or micro-architectural side channel with an [CWE-125] out-of-bounds read in Storage code paths. Insufficient isolation between storage operations permits an attacker to infer or manipulate memory outside the intended bounds. This class of flaw typically arises when timing, cache behavior, or shared resources reveal state that the same-origin policy is expected to protect.
Attack Vector
Exploitation proceeds through standard web delivery. An attacker hosts a crafted HTML document that invokes specific Storage API sequences designed to trigger the side channel. When a victim running a vulnerable Chrome build loads the page, the attacker's JavaScript observes leaked data or writes into unintended memory regions. Delivery channels include malicious advertisements, phishing links, compromised sites, and iframe embedding on otherwise trusted domains.
No verified public proof-of-concept is available. Technical detail on the exact API misuse pattern is tracked in the Chromium Issue Tracker Entry.
Detection Methods for CVE-2025-11207
Indicators of Compromise
- Chrome browser processes at versions below 141.0.7390.54 on managed endpoints.
- Outbound connections from browser processes to newly registered or low-reputation domains immediately after page loads.
- Unusual child-process activity or renderer crashes correlated with visits to untrusted sites.
Detection Strategies
- Inventory installed Chrome versions across the fleet and flag any build below 141.0.7390.54.
- Monitor renderer process telemetry for anomalous memory access patterns and repeated crashes tied to Storage APIs.
- Correlate web proxy logs with endpoint browser telemetry to identify sessions accessing suspicious HTML pages that trigger renderer instability.
Monitoring Recommendations
- Ingest browser version data into a central data lake to continuously validate patch compliance.
- Alert on Chrome auto-update failures, since unpatched browsers remain exposed to network-delivered exploits.
- Track threat intelligence feeds for weaponized proofs-of-concept referencing CVE-2025-11207 or the Chromium Storage component.
How to Mitigate CVE-2025-11207
Immediate Actions Required
- Update Google Chrome to version 141.0.7390.54 or later on Windows, macOS, and Linux endpoints.
- Force-close and relaunch Chrome after update deployment to activate the patched binaries.
- Verify enterprise policies do not pin Chrome to a vulnerable release channel or block automatic updates.
Patch Information
Google addressed the flaw in the Chrome Stable Channel update announced in the Google Blog Chrome Update. Chromium-based browsers that inherit the same Storage code should apply their vendor-supplied builds that incorporate the upstream fix referenced in the Chromium Issue Tracker Entry.
Workarounds
- Restrict browsing to trusted sites through enterprise web filtering until patching completes.
- Deploy site isolation and strict third-party cookie/storage policies through Chrome enterprise settings.
- Disable or limit non-essential Storage APIs on managed profiles where feasible.
# Verify installed Chrome version on Linux endpoints
google-chrome --version
# Windows: query installed version via registry
reg query "HKLM\Software\Google\Chrome\BLBeacon" /v version
# macOS: read the bundle version
defaults read /Applications/Google\ Chrome.app/Contents/Info CFBundleShortVersionString
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
