CVE-2026-113264 Google CVE debrief

Who should care

Google Chrome users, particularly those with extensions installed, should assess exposure to version 156.0.8078.47 and earlier, and apply updates as necessary. Defenders should verify Chrome version and update to 156.0.8078.47 or later. This vulnerability may require immediate attention for exposed Chrome installations.

Why it matters

CVE-2026-113264 is a medium-severity vulnerability in Google Chrome Extensions prior to version 156.0.8078.47. Defenders should assess exposure, apply updates, and monitor Chrome security advisories.

• Defenders should verify Chrome version and update to 156.0.8078.47 or later
• Exposure to vulnerable Chrome versions may require immediate attention
• Defenders should monitor Chrome release notes and security advisories for future updates

Technical summary

The CVE record describes an improper input validation vulnerability in Google Chrome Extensions prior to version 156.0.8078.47, which could potentially allow a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. This medium-severity issue requires defenders to assess exposure, apply updates, and monitor Chrome security advisories. The vulnerability is located in the Extensions component of Google Chrome, and it is recommended that users update to version 156.0.8078.47 or later to mitigate the vulnerability.

Defensive priority

Medium

Recommended defensive actions

• Review and apply Google Chrome updates to version 156.0.8078.47 or later
• Assess exposure of Chrome installations to the vulnerable version
• Monitor Chrome release notes and security advisories for future updates
• Verify Chrome version and update to 156.0.8078.47 or later
• 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 NVD entry provide details on the improper input validation vulnerability in Google Chrome Extensions prior to version 156.0.8078.47. The vulnerability is described as a medium-severity issue that could potentially allow a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. Defenders should verify Chrome version and update to 156.0.8078.47 or later. The CVE record was published on 2026-10-20T21:02:06.378Z 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.