CVE-2026-113159 Google CVE debrief

Who should care

Defenders responsible for managing Google Chrome deployments, particularly those using DevTools, should assess exposure and apply patches or mitigations as needed. This includes verifying DevTools exposure, user access controls, and ensuring timely patching or mitigation to prevent potential sensitive information leaks. Operational impact includes potential sensitive information leaks via crafted HTML pages, necessitating verification of DevTools exposure,

Why it matters

CVE-2026-113159 is a Medium-severity vulnerability in Google Chrome's DevTools that could allow remote attackers to potentially leak sensitive information. Defenders managing Chrome deployments, especially those using DevTools, should verify exposure, apply patches, and restrict exploitation attempts.

• Potential sensitive information leak via crafted HTML pages.
• Requires verification of DevTools exposure and user access controls.
• Necessitates patching or mitigating the vulnerability to prevent exploitation.

Technical summary

The vulnerability is caused by improper access control in DevTools of Google Chrome prior to version 156.0.8078.47. A remote attacker could potentially leak sensitive information via a crafted HTML page. This Medium-severity issue requires defenders to assess exposure and apply patches or mitigations as needed to prevent potential sensitive information leaks. The technical impact involves potential leaks of sensitive information, emphasizing the need for timely patching or mitigation to restrict exploitation attempts.

Defensive priority

Medium

Recommended defensive actions

• Review and apply the available patch for Google Chrome to version 156.0.8078.47 or later.
• Monitor for and restrict exploitation attempts targeting this vulnerability.
• Verify that DevTools is not exposed to untrusted networks or users.
• Confirm whether affected Google Chrome deployments exist in managed environments and assign an owner for follow-up.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and source item provide details on the vulnerability in Google Chrome prior to version 156.0.8078.47. The Chromium security severity is rated as Medium. This information is grounded in official CVE Program and NIST NVD sources, which provide comprehensive details on the vulnerability. Defenders should verify the exposure of Google Chrome deployments, especially those using DevTools, and apply patches or mitigations as needed. The CVE record was published on 2026-10-20T21:02:31.925Z and has not been modified since then.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.