CVE-2026-113303 Google CVE debrief

Who should care

Defenders responsible for Google Chrome deployments, particularly those using versions prior to 156.0.8078.47, should assess exposure and apply the patch. This includes IT teams managing Chrome installations, security teams monitoring for potential exploitation attempts, and operators responsible for ensuring the security of Chrome-based systems. Additionally, defenders should review and update their inventory of Chrome deployments to ensure version 156.0.

Why it matters

CVE-2026-113303 is a critical vulnerability in Google Chrome's WebRTC feature that allows potential code execution inside the sandbox. Defenders responsible for Chrome deployments should assess exposure, apply the patch, and monitor for exploitation attempts.

• Potential code execution inside the sandbox requires immediate patching and verification.
• Exposure to crafted HTML pages may lead to exploitation attempts.
• Defenders must update Chrome to version 156.0.8078.47 or later to mitigate vulnerability.
• Monitoring for exploitation attempts targeting this vulnerability is recommended.

Technical summary

Memory corruption in WebRTC in Google Chrome prior to 156.0.8078.47 allows a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. The vulnerability is a result of improper handling of WebRTC components, which can lead to memory corruption and potential code execution. Defenders must update Chrome to version 156.0.8078.47 or later to mitigate the vulnerability. The CVE record and source item provide details on the vulnerability, but limited information is available on potential exploits or victim impact.

Defensive priority

High

Recommended defensive actions

• Assess exposure and apply the patch for Google Chrome version 156.0.8078.47 or later.
• Review and update inventory of Chrome deployments to ensure version 156.0.8078.47 or later is used.
• Monitor for potential exploitation attempts targeting this vulnerability.
• 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.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and source item provide details on the vulnerability, but limited information is available on potential exploits or victim impact. Defenders should verify Chrome versions, assess exposure, and monitor for exploitation attempts targeting this vulnerability. The CVE record was published on 2026-10-20T21:01:45.739Z and has not been modified since then. No additional information is available on the number of affected systems or potential victim impact.

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.