CVE-2026-113054 Google CVE debrief

Who should care

Defenders for Chrome deployments should assess exposure and apply updates. It's crucial for them to verify Chrome versions and monitor for potential memory read attempts. Security teams and vulnerability management teams should also be aware of this vulnerability and its potential impact. They should review compensating controls and monitor for suspicious activity. Chrome operators and administrators should prioritize updating Chrome to version 156.0.8078.

Why it matters

CVE-2026-113054 is a medium-severity vulnerability in Chrome's SiteIsolation. Defenders should assess exposure, verify Chrome versions, and monitor for potential memory read attempts.

• Potential memory reads via crafted HTML pages
• Verification of Chrome version and update status required
• Monitoring for suspicious memory access attempts recommended

Technical summary

CVE-2026-113054 is an out-of-bounds read vulnerability in Chrome's SiteIsolation feature. It allows remote attackers to read memory inside the sandbox via crafted HTML pages. The vulnerability was addressed in Chrome version 156.0.8078.47. This medium-severity issue requires defenders to assess exposure, verify Chrome versions, and monitor for potential memory read attempts. The vulnerability highlights the importance of keeping Chrome up-to-date to prevent potential memory reads. Defenders should review compensating controls and monitor for suspicious activity.

Defensive priority

Medium

Recommended defensive actions

• Assess exposure for Chrome versions prior to 156.0.8078.47
• Verify and apply Chrome updates to 156.0.8078.47 or later
• Monitor for potential memory read attempts via crafted HTML pages
• 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

Official CVE and NVD records describe an out-of-bounds read vulnerability in Chrome's SiteIsolation. Google's Chrome release blog and Chromium issue tracker provide additional context. The CVE record was published on 2026-10-20T21:02:23.762Z and has not been modified since then. The vulnerability has a medium severity and was addressed in Chrome version 156.0.8078.47. Defenders should verify Chrome versions and monitor for potential memory read attempts.

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.