CVE-2026-13933 Overview
CVE-2026-13933 is an insufficient policy enforcement flaw in the Passwords component of Google Chrome prior to version 150.0.7871.47. A remote attacker who has already compromised the renderer process can read potentially sensitive information from process memory using a crafted HTML page. Google rates the Chromium security severity as Medium. The weakness is categorized under [CWE-284: Improper Access Control].
Critical Impact
Attackers with renderer-process compromise can extract sensitive password-related data from Chrome process memory, expanding the impact of an initial browser exploit into credential exposure.
Affected Products
- Google Chrome desktop versions prior to 150.0.7871.47
- Chromium-based builds shipping the vulnerable Passwords component
- All operating systems supported by the Chrome Stable channel (Windows, macOS, Linux)
Discovery Timeline
- 2026-06-30 - CVE-2026-13933 published to the National Vulnerability Database
- 2026-07-01 - Last updated in NVD database
Technical Details for CVE-2026-13933
Vulnerability Analysis
The vulnerability resides in the Passwords component of Google Chrome. Chrome enforces internal policies to restrict which processes can access credential data held by the browser. Prior to version 150.0.7871.47, these policy checks were insufficient, allowing a compromised renderer to reach data it should not be able to read.
Exploitation is not standalone. The attacker must first compromise the renderer process, typically by chaining an earlier browser bug such as a memory corruption or type confusion issue. Once inside the renderer, the attacker uses a crafted HTML page to trigger paths that expose password-related memory contents.
The user interaction requirement and high attack complexity limit opportunistic exploitation. However, when paired with a renderer-level exploit, this flaw becomes a useful post-exploitation primitive for credential theft.
Root Cause
The root cause is improper access control [CWE-284] within the Passwords subsystem. Chrome's sandboxing model relies on the browser process, not the renderer, holding sensitive credential material. Missing or weak enforcement in the Passwords component let a compromised renderer bypass this boundary and observe memory it should not access.
Attack Vector
The attack chain begins with a network-delivered payload that compromises the renderer through a separate vulnerability. The attacker then delivers a crafted HTML page that interacts with the Passwords component. Because policy enforcement is insufficient, the renderer receives potentially sensitive data from process memory. Confidentiality is impacted; integrity and availability are not.
No verified proof-of-concept code has been published for this specific issue. See the Chromium Issue Tracker Entry for restricted technical details.
Detection Methods for CVE-2026-13933
Indicators of Compromise
- Chrome renderer processes exhibiting unexpected inter-process communication (IPC) volume with the browser process
- Endpoints running Chrome versions below 150.0.7871.47 after the patch release
- Browser crash reports or renderer sandbox violations preceding credential-abuse events
Detection Strategies
- Inventory installed Chrome builds and flag any instance older than 150.0.7871.47
- Correlate renderer process anomalies with subsequent authentication events from the same host
- Monitor Chrome update telemetry to confirm the Stable channel patch has rolled out enterprise-wide
Monitoring Recommendations
- Track outbound authentication attempts from hosts that recently loaded untrusted content in Chrome
- Alert on Chrome child-process behavior that deviates from baseline, such as unusual memory access patterns
- Ingest Chrome browser telemetry and endpoint logs into a centralized analytics platform for cross-source correlation
How to Mitigate CVE-2026-13933
Immediate Actions Required
- Update Google Chrome to version 150.0.7871.47 or later on all managed endpoints
- Force-restart browser sessions to ensure the patched binary is loaded into memory
- Validate patch deployment through configuration management or endpoint inventory tooling
Patch Information
Google addressed CVE-2026-13933 in Chrome Stable 150.0.7871.47. Details are published in the Google Chrome Desktop Update release announcement. Chromium-based browsers should pick up the fix from the corresponding upstream merge referenced in the Chromium Issue Tracker Entry.
Workarounds
- Restrict browsing to trusted sites via enterprise policy until the patch is applied
- Disable or restrict Chrome's built-in password manager and use an isolated credential vault where feasible
- Enforce site isolation and strict sandboxing policies through Chrome Enterprise settings
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
