CVE-2026-13808: Google Chrome Information Disclosure Flaw

CVE-2026-13808 Overview

CVE-2026-13808 is an insufficient data validation vulnerability in Google Chrome for iOS versions prior to 150.0.7871.47. The flaw allows a local attacker with physical access to the device to obtain potentially sensitive information from process memory. Google classifies the Chromium security severity as High, while the NVD CVSS score is 4.6 (Medium) due to the physical attack vector requirement.

The issue is categorized under CWE-20: Improper Input Validation. Exploitation targets memory contents of the Chrome browser process, which may contain browsing artifacts, tokens, or cached credentials.

Critical Impact
A local attacker with physical access to an unlocked iOS device can read sensitive data from Chrome's process memory, potentially exposing browsing history, authentication material, or cached user content.

Affected Products

Google Chrome for iOS versions prior to 150.0.7871.47
Apple iOS devices running vulnerable Chrome builds
Chromium-based iOS browser components

Discovery Timeline

2026-06-30 - CVE-2026-13808 published to NVD
2026-07-01 - Last updated in NVD database

Technical Details for CVE-2026-13808

Vulnerability Analysis

The vulnerability stems from insufficient validation of data handled by Chrome for iOS. When the browser processes certain inputs, it fails to enforce boundary or content checks before returning or displaying data drawn from process memory. This gap enables an attacker to trigger conditions where uninitialized or adjacent memory contents are surfaced.

Because the attack vector is physical (AV:P), the attacker must interact directly with the target device. The impact is limited to confidentiality — integrity and availability of the system are not affected. Sensitive data at risk includes session tokens, form autofill contents, and cached page data held in the renderer or browser process.

The EPSS score is 0.134%, reflecting a low probability of automated exploitation in the wild. No public proof-of-concept, CISA KEV listing, or exploit database entry currently exists for this issue.

Root Cause

The root cause is improper input validation ([CWE-20]) within Chrome for iOS code paths that consume untrusted or attacker-influenced data. Missing sanitization or length checks allow memory contents adjacent to intended buffers to leak into observable outputs. See the Chromium Issue Tracker Entry for tracking details.

Attack Vector

An attacker with physical access to an unlocked iOS device running a vulnerable Chrome version interacts with the browser to trigger the validation flaw. The attacker then observes rendered content, exported data, or diagnostic output that includes leaked memory. No user interaction beyond the attacker's own physical manipulation is required, and no privileges are needed within the browser.

The vulnerability mechanism is described in the Google Chrome Release Notes. No verified exploit code is available.

Detection Methods for CVE-2026-13808

Indicators of Compromise

Chrome for iOS versions below 150.0.7871.47 present on managed mobile devices
Physical access events on unlocked corporate iOS devices outside expected user sessions
Anomalous Chrome data exports, screenshots, or share-sheet activity from unattended devices

Detection Strategies

Inventory iOS Chrome versions across the mobile fleet and flag installations below 150.0.7871.47
Correlate mobile device management (MDM) telemetry with unlock events during off-hours or lost/stolen device reports
Monitor for unexpected data egress from Chrome on iOS, such as unusual clipboard or share activity

Monitoring Recommendations

Enable MDM compliance policies that report installed browser versions and enforce minimum builds
Log physical access indicators including failed unlock attempts and device recovery events
Track Chrome update posture through App Store deployment reports to identify lagging endpoints

How to Mitigate CVE-2026-13808

Immediate Actions Required

Update Google Chrome for iOS to version 150.0.7871.47 or later through the Apple App Store
Enforce device-level passcodes, biometric authentication, and short auto-lock timeouts on all iOS devices
Require full-device encryption and remote wipe capability via MDM for lost or stolen devices

Patch Information

Google addressed the issue in Chrome for iOS 150.0.7871.47. Users should install the update via the Apple App Store. Details are published in the Google Chrome Stable Channel Update and tracked in the Chromium Issue Tracker.

Workarounds

Restrict use of Chrome on iOS until the update is applied and use a patched alternative browser where possible
Avoid storing sensitive credentials, autofill data, or session tokens in Chrome for iOS on shared or high-risk devices
Maintain physical custody of iOS devices and disable lock-screen previews that could aid an attacker

bash

# Example MDM compliance rule (pseudo-configuration)
app.bundle_id = "com.google.chrome.ios"
app.min_version = "150.0.7871.47"
action.on_noncompliance = "block_and_notify"